The first case of someone being reinfected with coronavirus has been reported by researchers in Hong Kong. The findings could have significant implications for the development of vaccines and what is known about natural immunity against Covid-19.
Researchers at the University of Hong Kong's department of microbiology said that an "apparently young and healthy patient had a second episode of Covid-19 infection which was diagnosed 4.5 months after the first episode".
They added that the case illustrates reinfection can occur a few months after recovery from the first infection. The man had no symptoms - was asymptomatic - during the second infection which was picked up by screening tests on returning passengers at Hong Kong airport.