Volunteers who received the Pfizer coronavirus vaccine during trials say it left them feeling like they had a “severe hangover,” according to reports.
The more than 43,500 people in six countries who took part in phase three trials by the pharmaceutical giant were never told whether they were injected with the vaccine or a placebo in the double-blind tests.
But some said they knew they had the drug because of headaches, fever and muscle aches that were compared to getting the flu shot or recovering from a heavy night out, the Sun said.
Texan Glenn Deshields, 44, said his “severe hangover” symptoms soon cleared up, however — and he later took an antibody test that came back positive.
He said he was “very excited” by Monday’s news that the tests showed the vaccine was 90% effective — and compared it to the end of a war.
“My grandfather, one of his first memories was of the bells ringing when World War I ended,” said the lobbyist from Austin.
“It was a horrific war and horrible things happened and people were just happy it was over with.
Another volunteer who only gave her first name, Carrie, said she suffered a headache, fever and aches all over her body after her first shot — symptoms that were even more severe after the second one, Metro UK said.