Covid-19: Moderna and Pfizer vaccines prevent infections as well as symptoms, CDC study finds

Covid-19: Moderna and Pfizer vaccines prevent infections as well as symptoms, CDC study finds Owen DyerVaccination with the Pfizer or Moderna vaccine reduces infections by 90%, while a single dose confers 80% protection, shows a study led by the US Centers for Disease Control and Prevention (CDC) that followed essential workers through the worst months of the pandemic.1 The study is one of a small number that employ regular testing to measure vaccines' impact on infection rates rather than counting cases of symptomatic disease, hospital admission, or death.The participants were 3950 essential workers, with no documented history of SARS-CoV-2 infection, in eight largely urban US locations.Of these people, 2479 (63%) received both vaccine doses, 477 (12%) received only one dose, and 994 (25%) were unvaccinated.Dyer O. Trump appointees tamper with renowned CDC publication, claiming that scientists are trying to "hurt the president".