Pfizer says COVID-19 vaccine is looking 90% effective

Pfizer Inc. said that its COVID-19 vaccine may be 90% effective, Monday, Nov. 9, based on early and incomplete test results that 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 as a referendum on President Donald Trump’s handling of the scourge, which has killed more than 1.2 million people worldwide, including almost a quarter-million in the United States alone.

“We’re in a position potentially to be able to offer some hope,” Dr. Bill Gruber, Pfizer’s seni...