Immunity to covid-19 could disappear in months, a new study suggests

https://www.technologyreview.com/2020/07/13/1005103/immunity-to-covid-19-could-disappear-in-months-a-new-study-suggests/?truid=b5b097687cc2308efd2a7c040e3dd1b3&utm_source=the_download&utm_medium=email&utm_campaign=the_download.unpaid.engagement&utm_term=subs&utm_content=07-13-2020