CDC study finds Pfizer, Moderna vaccines are 90% effective after two doses in real-world conditions
By Jen Christensen Under real world conditions, the Pfizer and Moderna Covid-19 vaccines provide highly effective protection, according to a new report from the US Centers for Disease Control and Prevention. At full vaccination, the vaccines were 90% effective at preventing infections, including infections that had no symptoms. At least 14 days after first dose but before second dose, they were 80% protective, according to the agency’s Morbidity and Mortality Weekly Report published Monday. The CDC said it is the first of many planned Covid-19 vaccine effectiveness studies. The study looked at how the vaccines protected nearly 4,000 health care