Pfizer and BioNTech say their COVID-19 vaccine is over 90% effective
By Michael Erman and Julie SteenhuysenNov 9 (Reuters) - Pfizer Inc said on Monday its experimental COVID-19 vaccine was more than 90% effective, a major...
By Michael Erman and Julie SteenhuysenNov 9 (Reuters) - Pfizer Inc said on Monday its experimental COVID-19 vaccine was more than 90% effective, a major...