<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0120-0011</journal-id>
<journal-title><![CDATA[Revista de la Facultad de Medicina]]></journal-title>
<abbrev-journal-title><![CDATA[rev.fac.med.]]></abbrev-journal-title>
<issn>0120-0011</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-00112022000200007</article-id>
<article-id pub-id-type="doi">10.15446/revfacmed.v70n2.92823</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Deaths, infections, and herd immunity in the COVID-19 pandemic: A comparative study of the strategies for disease containment implemented in Peru and the United Kingdom]]></article-title>
<article-title xml:lang="es"><![CDATA[Muertes, infecciones e inmunidad de rebaño en la pandemia por COVID-19: un estudio comparativo de las estrategias de control de la pandemia implementadas en Perú y Reino Unido]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moya-Salazar]]></surname>
<given-names><![CDATA[Jeel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cañari]]></surname>
<given-names><![CDATA[Betsy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zuñiga]]></surname>
<given-names><![CDATA[Nahomi]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jaime-Quispe]]></surname>
<given-names><![CDATA[Alexis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Zumaran]]></surname>
<given-names><![CDATA[Víctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Contreras-Pulache]]></surname>
<given-names><![CDATA[Hans]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Privada Norbert Wiener South American Center ]]></institution>
<addr-line><![CDATA[Lima ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Tecnológica del Perú Faculty of Engineering ]]></institution>
<addr-line><![CDATA[Lima ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital Nacional Docente Madre Niño San Bartolomé Department of Pathology ]]></institution>
<addr-line><![CDATA[Lima ]]></addr-line>
<country>Peru</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<volume>70</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-00112022000200007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-00112022000200007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-00112022000200007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: In light of the threat posed by the COVID-19 pandemic, most countries have implemented several containment and prevention measures to slow down the rapid spread of the disease.  Objectives: To compare the COVID-19 pandemic containment strategies implemented in Peru [World Health Organization (WHO) - confinement and social distancing] and the United Kingdom [herd immunity (HI)] in terms of morbidity and mortality, and to simulate the implementation of HI in Peru during the initial stage of the pandemic.  Materials and methods: Exploratory study with a simulation model based on official data obtained from both countries at the beginning of the pandemic. Mortality, case fatality, and infection rates documented within the first 55 days after the first COVID-19 case report in the United Kingdom and the start of the WHO-recommended containment and prevention strategy implementation in Peru were evaluated. Additionally, the impact of applying HI, according to WHO guidelines, as the initial strategy in Peru was simulated. The Paired-samples t-test was used to determine the differences between the two strategies at both stages of the study.  Results: During the follow-up period, 15 034 and 33 931 COVID-19 cases were reported in the United Kingdom and Peru, respectively. The case fatality rate was higher in the United Kingdom (7.82% vs. 2.74%), while the cumulative mortality rate was higher in Peru (2.89 vs. 1.74x100 000 inhabitants p= 0.0001). Regarding the simulation, a minimum critical population of 60% (&gt;19 million positive cases) was established for Peru to achieve HI, with 1 223 473.1 deaths and a hospitalization rate of 44 770x100 000 patients.  Conclusions: During the follow-up period (55 days), the United Kingdom's strategy resulted in a higher case fatality rate, while the Peruvian strategy in over twice as many COVID-19 cases. The HI simulation strategy in Peru showed a sharp increase in all unfavorable indicators of the pandemic.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción. Ante la amenaza de la pandemia por COVID-19, la mayoría de los países han establecido diversas medidas de control y prevención para disminuir la rápida propagación de esta enfermedad.  Objetivos. Comparar las estrategias de control de la pandemia por COVID-19 implementadas en Perú (de confinamiento y distanciamiento social de la Organización Mundial de la Salud (OMS)) y Reino Unido (de inmunidad de rebaño (IR)) en términos de morbimortalidad, y simular la implementación de la IR en Perú durante la etapa inicial de la pandemia.  Materiales y métodos. Estudio exploratorio con un modelo de simulación basado en datos oficiales de ambos países registrados al inicio de la pandemia. Se evaluaron las tasas de mortalidad, letalidad e infección en Reino Unido (IR) y Perú (confinamiento y distanciamiento social) dentro de los 55 días posteriores al reporte del primer caso de COVID-19 en Reino Unido y al inicio de la implementación de la estrategia de control y prevención recomendada por la OMS en Perú. Además, se simuló el impacto de haber aplicado la IR, según pautas de la OMS, como estrategia inicial en Perú. Se utilizó la prueba t-Student para muestras relacionadas para determinar las diferencias entre ambas estrategias en las dos etapas del estudio.  Resultados. En el periodo de seguimiento se registraron 15 034 y 33 931 casos de COVID-19 en Reino Unido y Perú, respectivamente. La tasa de letalidad fue mayor para Reino Unido (7.82% vs. 2.74%), y la tasa de mortalidad acumulada fue mayor en Perú (2.89 vs. 1.74x100 000 habitantes; p=0.0001). Respecto a la simulación, se estableció una población crítica mínima de 60% (&gt;19 millones de casos positivos) para que Perú logre la IR, con 1 223 473.1 muertes y una tasa de hospitalización de 44 770x100 000 pacientes.  Conclusiones. Durante el periodo de seguimiento (55 días), la estrategia de Reino Unido resultó en una mayor letalidad y la peruana, en más del doble de casos de COVID-19. La simulación de la IR en Perú mostró un dramático incremento de todos los indicadores desfavorables de la pandemia.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[COVID-19]]></kwd>
<kwd lng="en"><![CDATA[Inmunidad colectiva]]></kwd>
<kwd lng="en"><![CDATA[SARS-CoV-2]]></kwd>
<kwd lng="en"><![CDATA[Perú]]></kwd>
<kwd lng="en"><![CDATA[Reino Unido]]></kwd>
<kwd lng="en"><![CDATA[Mortalidad (DeCS)]]></kwd>
<kwd lng="es"><![CDATA[COVID-19]]></kwd>
<kwd lng="es"><![CDATA[Herd Immunity]]></kwd>
<kwd lng="es"><![CDATA[SARS-CoV-2]]></kwd>
<kwd lng="es"><![CDATA[Peru]]></kwd>
<kwd lng="es"><![CDATA[United Kingdom]]></kwd>
<kwd lng="es"><![CDATA[Mortality (MeSH)]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodríguez-Cuenca]]></surname>
<given-names><![CDATA[JV]]></given-names>
</name>
</person-group>
<source><![CDATA[Diseases in pre-Hispanic living conditions in Colombia]]></source>
<year>2006</year>
<publisher-loc><![CDATA[Bogotá D.C. ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sáez]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La peste Antonina: una peste global en el siglo II d.C]]></article-title>
<source><![CDATA[Rev. chil. infectol]]></source>
<year>2016</year>
<volume>33</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>218-21</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pachas]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Mendoza]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Gonzales]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Fernández]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Céspedes]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Control de la peste en La Libertad, Perú]]></article-title>
<source><![CDATA[Rev. perú. med. exp. salud pública]]></source>
<year>2010</year>
<volume>27</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>473-7</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ledermann]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[El hombre y sus epidemias a través de la historia]]></article-title>
<source><![CDATA[Rev Chil Infect]]></source>
<year>2003</year>
<volume>20</volume>
<numero>^s1</numero>
<issue>^s1</issue>
<supplement>1</supplement>
<page-range>13-7</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lüthy]]></surname>
<given-names><![CDATA[IA]]></given-names>
</name>
<name>
<surname><![CDATA[Ritacco]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Kantor]]></surname>
<given-names><![CDATA[IN]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A cien años de la gripe Española]]></article-title>
<source><![CDATA[Medicina]]></source>
<year>2018</year>
<volume>78</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>113-8</page-range><publisher-loc><![CDATA[Buenos aires ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="book">
<collab>United States Agency for International Development (UNAIDS)</collab>
<source><![CDATA[Fact sheet 2019]]></source>
<year>2019</year>
<publisher-name><![CDATA[Global HIV statistics. UNAIDS]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="book">
<collab>World Health Organization (WHO)</collab>
<source><![CDATA[Rolling updates on coronavirus disease (COVID-19)]]></source>
<year>2020</year>
<publisher-loc><![CDATA[Geneva ]]></publisher-loc>
<publisher-name><![CDATA[WHO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="book">
<collab>World Health Organization (WHO)</collab>
<source><![CDATA[WHO Coronavirus (COVID-19) Dashboard]]></source>
<year>2021</year>
<publisher-loc><![CDATA[Geneva ]]></publisher-loc>
<publisher-name><![CDATA[WHO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Anderson]]></surname>
<given-names><![CDATA[RM]]></given-names>
</name>
<name>
<surname><![CDATA[Heesterbeek]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Klinkenberg]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Hollingsworth]]></surname>
<given-names><![CDATA[TD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[How will country-based mitigation measures influence the course of the COVID-19 epidemic?]]></article-title>
<source><![CDATA[Lancet]]></source>
<year>2020</year>
<volume>395</volume>
<numero>10228</numero>
<issue>10228</issue>
<page-range>931-4</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yong]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The U.K.'s Coronavirus 'Herd Immunity' Debacle]]></article-title>
<source><![CDATA[The Atlantic]]></source>
<year>2020</year>
</nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fine]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Eames]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Heymann]]></surname>
<given-names><![CDATA[DL]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA["Herd Immunity": A Rough Guide]]></article-title>
<source><![CDATA[Clin Infect Dis]]></source>
<year>2011</year>
<volume>52</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>911-6</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="book">
<collab>Pan American Health Organization (PAHO)</collab>
<source><![CDATA[Response to the COVID-19 Pandemic in the Americas: Response Strategy and Donor Appeal]]></source>
<year>2021</year>
<publisher-loc><![CDATA[Washington D.C. ]]></publisher-loc>
<publisher-name><![CDATA[PAHO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="book">
<collab>UK Goverment</collab>
<source><![CDATA[Coronavirus (COVID-19) in the UK]]></source>
<year>2021</year>
<publisher-loc><![CDATA[London ]]></publisher-loc>
<publisher-name><![CDATA[GOV.UK]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="book">
<collab>Perú. Ministerio de Salud (Minsa)</collab>
<source><![CDATA[Sala Situacional COVID-19 Perú]]></source>
<year>2020</year>
<publisher-loc><![CDATA[Loma ]]></publisher-loc>
<publisher-name><![CDATA[Minsa]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="book">
<collab>Perú. Instituto Nacional de Estadística e Informática (INEI)</collab>
<source><![CDATA[Estado de la población peruana 2020]]></source>
<year>2020</year>
<publisher-loc><![CDATA[Lima ]]></publisher-loc>
<publisher-name><![CDATA[INEI]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="book">
<collab>World Health Organization (WHO)</collab>
<source><![CDATA[Statement on the first meeting of the International Health Regulations (2005) Emergency Committee regarding the outbreak of novel coronavirus 2019 (n-CoV)]]></source>
<year>2020</year>
<publisher-loc><![CDATA[Geneva ]]></publisher-loc>
<publisher-name><![CDATA[WHO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="book">
<collab>Organización Panamericana de la Salud (OPS)</collab>
<source><![CDATA[Plan estratégico de preparación y respuesta frente a la COVID-19. Orientación para la planificación operativa]]></source>
<year>2021</year>
<publisher-loc><![CDATA[Washington ]]></publisher-loc>
<publisher-name><![CDATA[OPS]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Billah]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Miah]]></surname>
<given-names><![CDATA[MM]]></given-names>
</name>
<name>
<surname><![CDATA[Khan]]></surname>
<given-names><![CDATA[MN]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reproductive number of coronavirus: A systematic review and metaanalysis based on global level evidence]]></article-title>
<source><![CDATA[PLoS One]]></source>
<year>2020</year>
<volume>15</volume>
<numero>11</numero>
<issue>11</issue>
</nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Anderson]]></surname>
<given-names><![CDATA[RM]]></given-names>
</name>
<name>
<surname><![CDATA[May]]></surname>
<given-names><![CDATA[RM]]></given-names>
</name>
</person-group>
<source><![CDATA[Infectious diseases of humans: dynamics and control]]></source>
<year>1992</year>
<publisher-loc><![CDATA[New York ]]></publisher-loc>
<publisher-name><![CDATA[Oxford University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="">
<collab>Laboratory confirmed COVID-19-Associated Hospitalizations</collab>
<source><![CDATA[COVID-NET (A weekly summary of US COVID-19 Hospitalization data)]]></source>
<year>2020</year>
<publisher-loc><![CDATA[Clifton Road, Atlanta ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kwok]]></surname>
<given-names><![CDATA[KO]]></given-names>
</name>
<name>
<surname><![CDATA[Lai]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Wei]]></surname>
<given-names><![CDATA[WI]]></given-names>
</name>
<name>
<surname><![CDATA[Wong]]></surname>
<given-names><![CDATA[SYS]]></given-names>
</name>
<name>
<surname><![CDATA[Tang]]></surname>
<given-names><![CDATA[JWT]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Herd immunity - estimating the level required to halt the COVID-19 epidemics in affected countries]]></article-title>
<source><![CDATA[J Infect]]></source>
<year>2020</year>
<volume>80</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>e32-3</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Britton]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Ball]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Trapman]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A mathematical model reveals the influence of population heterogeneity on herd immunity to SARS-CoV-2]]></article-title>
<source><![CDATA[Science]]></source>
<year>2020</year>
<volume>369</volume>
<numero>6505</numero>
<issue>6505</issue>
<page-range>846-9</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Okell]]></surname>
<given-names><![CDATA[LC]]></given-names>
</name>
<name>
<surname><![CDATA[Verity]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Watson]]></surname>
<given-names><![CDATA[OJ]]></given-names>
</name>
<name>
<surname><![CDATA[Mishra]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Walker]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Whittaker]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Have deaths from COVID-19 in Europe plateaued due to herd immunity?]]></article-title>
<source><![CDATA[Lancet]]></source>
<year>2020</year>
<volume>395</volume>
<numero>10241</numero>
<issue>10241</issue>
<page-range>E110-1</page-range></nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ghosh]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Coronavirus: some scientists say UK virus strategy is &#8216;risking lives'. BBC News. March 16, 2020]]></article-title>
<source><![CDATA[Science]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Boseley]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<source><![CDATA[New data, new policy: why UK's coronavirus strategy changed]]></source>
<year>2020</year>
<publisher-name><![CDATA[The Guardian]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B26">
<label>26</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Randolph]]></surname>
<given-names><![CDATA[HE]]></given-names>
</name>
<name>
<surname><![CDATA[Barreiro]]></surname>
<given-names><![CDATA[LB]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Herd Immunity: Understanding COVID-19]]></article-title>
<source><![CDATA[Immunity]]></source>
<year>2020</year>
<volume>52</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>737-41</page-range></nlm-citation>
</ref>
<ref id="B27">
<label>27</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Prem]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Russell]]></surname>
<given-names><![CDATA[TW]]></given-names>
</name>
<name>
<surname><![CDATA[Kucharski]]></surname>
<given-names><![CDATA[AJ]]></given-names>
</name>
<name>
<surname><![CDATA[Eggo]]></surname>
<given-names><![CDATA[RM]]></given-names>
</name>
<name>
<surname><![CDATA[Davies]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effect of control strategies to reduce social mixing on outcomes of the COVID-19 epidemic in Wuhan, China: a modelling study]]></article-title>
<source><![CDATA[Lancet Public Health]]></source>
<year>2020</year>
<volume>5</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>e261-70</page-range></nlm-citation>
</ref>
<ref id="B28">
<label>28</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[DeLong]]></surname>
<given-names><![CDATA[JB]]></given-names>
</name>
<name>
<surname><![CDATA[Summers]]></surname>
<given-names><![CDATA[LH]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fiscal Policy in a Depressed Economy]]></article-title>
<source><![CDATA[Brookings Pap Econ Act]]></source>
<year>2012</year>
<volume>2012</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>233-97</page-range></nlm-citation>
</ref>
<ref id="B29">
<label>29</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schwandt]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[von Wachter]]></surname>
<given-names><![CDATA[TM]]></given-names>
</name>
</person-group>
<source><![CDATA[Socioeconomic decline and death: Midlife impacts of graduating in a recession]]></source>
<year>2020</year>
<publisher-loc><![CDATA[Cambridge ]]></publisher-loc>
<publisher-name><![CDATA[NBER Working Paper 26638]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B30">
<label>30</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gudbjartsson]]></surname>
<given-names><![CDATA[DF]]></given-names>
</name>
<name>
<surname><![CDATA[Norddahl]]></surname>
<given-names><![CDATA[GL]]></given-names>
</name>
<name>
<surname><![CDATA[Melsted]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Gunnarsdottir]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Holm]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Eythorsson]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Humoral Immune Response to SARS-CoV-2 in Iceland]]></article-title>
<source><![CDATA[N Engl J Med]]></source>
<year>2020</year>
<volume>383</volume>
<numero>18</numero>
<issue>18</issue>
<page-range>1724-34</page-range></nlm-citation>
</ref>
<ref id="B31">
<label>31</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dan]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Mateus]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Kato]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Hastie]]></surname>
<given-names><![CDATA[KM]]></given-names>
</name>
<name>
<surname><![CDATA[Yu]]></surname>
<given-names><![CDATA[ED]]></given-names>
</name>
<name>
<surname><![CDATA[Faliti]]></surname>
<given-names><![CDATA[CE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Immunological memory to SARS-CoV-2 assessed for up to 8 months after infection]]></article-title>
<source><![CDATA[Science]]></source>
<year>2021</year>
<volume>371</volume>
<numero>6529</numero>
<issue>6529</issue>
</nlm-citation>
</ref>
<ref id="B32">
<label>32</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Haug]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Ranking the effectiveness of worldwide COVID-19 government interventions]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Geyrhofer]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Londei]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Dervic]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Desvars-Larrive]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[Nat Hum Behav]]></source>
<year>2020</year>
<volume>4</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>1303-12</page-range></nlm-citation>
</ref>
<ref id="B33">
<label>33</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chang]]></surname>
<given-names><![CDATA[SL]]></given-names>
</name>
<name>
<surname><![CDATA[Harding]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Zachreson]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Cliff]]></surname>
<given-names><![CDATA[OM]]></given-names>
</name>
<name>
<surname><![CDATA[Prokopenko]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Modelling transmission and control of the COVID-19 pandemic in Australia]]></article-title>
<source><![CDATA[Nat Commun]]></source>
<year>2020</year>
<volume>11</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>5710</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
