2 monkeypox strains in US suggest possible undetected spread
As of Friday, the U.S. had identified at least 20 cases in 11 states. Genetic analysis of recent monkeypox cases suggests there are two distinct strains in the U.S., health officials said Friday, raising the possibility that the virus has been circulating undetected for some time. Many of the U.S. cases were caused by the…
