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Covid-19 2020-07 part one
Covid-19 Immunity
Covid-19 Transmissibility June through August 2020

no Covid-19 herd immunity as antibodies drop rapidly      web

webhttps://edition.cnn.com/2020/07/06/health/spain-coronavirus-antibody-study-lancet-intl/index.html
authorAl Goodman
publicationCNN
date2020-07-06

Documents:
webProf Marina Pollेn, MD, Beat...The Lancet2020-07-06

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