Covid-19 Delta variant is said to be as contagious as chickenpox and likely to be transmitted by vaccinees and non-vaccinees – according to the latest official documents issued by the U.S. Centers for Disease Control, updated by the Washington Post.
This Monday January 11, 2021 WHO said that herd immunity to Covid-19 was not to happen this year, despite vaccines issued on the market and vaccine campaigns that started around the world.
