From the NY Times. Covid-19 immunity "may" last a lifetime new data hints. The research, published online, has not been peer-reviewed nor published in a scientific journal. But it is the most comprehensive and long-ranging study of immune memory to the coronavirus to date.
Immunity to the Coronavirus May Last Years, New Data Hint (Published 2020)
Blood samples from recovered patients suggest a powerful, long-lasting immune response, researchers reported.
www.nytimes.com