Coronavirus antibodies decline after infection, study finds, raising questions about herd immunity CNBCBritish study shows evidence of waning immunity to Covid-19 CNNCovid: Antibodies 'fall rapidly after infection' BBC NewsAsymptomatic virus sufferers lose antibodies sooner: Study - The Jakarta Post Jakarta PostCOVID-19 immunity may only last a few months after infection, study indicates MarketWatchView Full Coverage on Google News