His case is the first confirmed account of SARS-CoV-2 reinfection. The fact that some people can be reinfected with the virus is “not a huge shock,” says Paul Bieniasz, a virologist at the ...

So far, reinfection seems to be rare - there have been only a few examples out of more than 37 million confirmed cases. Reports in Hong Kong, Belgium and the Netherlands said they were no more ...

They say genome sequencing shows the two strains of the virus are "clearly different", making it the world's first proven case of reinfection. The World Health Organization warns it is important ...

Lyme disease is increasing in both incidence and geographic distribution. Given that the etiologic agent, Borrelia burgdorferi, is difficult to culture in routine clinical laboratories, there has ...