Immunity to Covid-19 may be lost in just a few months, new research suggests

King's College London scientists looked at the immune response of more than 90 patients and healthcare workers. The study suggests a vaccine for coronavirus may have to be reformulated yearly. https://www.dailymail.co.uk/sciencetech/article-8515925/Immunity-Covid-19-lost-just-months-new-research-suggests.html?ns_mchannel=rss&ns_campaign=1490&ito=1490