Pfizer says COVID-19 vaccine is looking 90 percent effective
Pfizer Inc. said Monday that its COVID-19 vaccine may be a remarkable 90 percent effective, based on early and incomplete test results that nevertheless brought a big burst of opti…
Pfizer Inc. said Monday that its COVID-19 vaccine may be a remarkable 90 percent effective, based on early and incomplete test results that nevertheless brought a big burst of opti…