Share this postHerd Immunity: Understanding COVID-19zapspin.substack.comCopy linkFacebookEmailNotesOtherDiscover more from zap‘s spinsSome people like cupcakes better. I for one care less for them.SubscribeContinue readingSign in Herd Immunity: Understanding COVID-19University of Chicago, ChicagoelbrootsFeb 27, 2022Share this postHerd Immunity: Understanding COVID-19zapspin.substack.comCopy linkFacebookEmailNotesOtherShareHerd Immunity