Pfizer told the world 15 people who received the vaccine in its trial had died as of mid-March. Turns out the real number then was 21, compared to only 17 deaths in people who hadn’t been vaccinated.
On July 28, Pfizer and its partner BioNTech posted a six-month data update from their key Covid vaccine clinical trial, the one that led regulators worldwide to okay the shot.
At a time when questions about vaccine effectiveness were rising, the report received worldwide attention. Pfizer said the vaccine’s efficacy remained relatively strong, at 84 percent after six months.
It also reported 15 of the roughly 22,000 people who received the vaccine in the trial had died, compared to 14 of the 22,000 people who received placebo (a saline shot that didn’t contain the vaccine).