British study shows evidence of waning immunity to Covid-19 CNNStudy Shows Covid-19 Antibodies Waning Over Time, Suggesting Immunity May Wear Off msnNOWCovid: Antibodies 'fall rapidly after infection' BBC NewsAsymptomatic virus sufferers lose antibodies sooner: Study - The Jakarta Post Jakarta PostCOVID-19 Can Make Patients' Immune Systems Attack Their Own Bodies, Study Shows ScienceAlertView Full Coverage on Google News