<affiliation wicri:level="3"><nlm:affiliation>National Institute for Viral Diseases Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, P. R. China.</nlm:affiliation>
<country xml:lang="fr" wicri:curation="lc">République populaire de Chine</country>
<wicri:regionArea>National Institute for Viral Diseases Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing</wicri:regionArea>
<placeName><settlement type="city">Pékin</settlement>
</placeName>
</affiliation>