Pfizer says COVID-19 vaccine is looking 90% effective

Pfizer Inc. said Monday that its COVID-19 vaccine may be a remarkable 90% effective, based on early and incomplete test results that nevertheless brought a big burst of optimism to a world desperate for the means to finally bring the catastrophic outbreak under control. The announcement came less than a week after an election seen … Continue reading Pfizer says COVID-19 vaccine is looking 90% effective