The more than 43,000 volunteers in six countries who participated in the clinical trials of Pfizer’s vaccine candidate reported that it left them feeling hungover. On Monday, the pharmaceutical giant announced that its vaccine was more than 90% effective in preventing COVID-19 and will pursue emergency use approval by the Food and Drug Administration.
But according to New York Post, although the volunteers who took part in the phase 3 trials weren’t told if they were injected with the vaccine or a placebo, the participants who experienced flu-like side effects such as muscle aches, fever, and headaches assumed they got the drug.
One volunteer, 45-year-old Carrie from Missouri, said she experienced a headache, fever, and body aches, after her first shot in September. Giving only her first name, she told The Sun that her side effects were more severe after her second dose last month. Carrie believes that she received the actual vaccine based on her experiences.
Glenn Deshields, 44, from Austin, Texas, suffered “severe hangover” symptoms that fortunately soon cleared. A post-vaccine antibody test that came back positive confirmed his suspicion that he did receive the vaccine and not the placebo, according to the Post.
According to Vaccines.gov, the most common side effects from vaccines are usually mild and can include pain, mild fever, chills, fatigue, headaches, and muscles aches, as well as discomfort and redness around the injection site. These symptoms indicate that the body is building an immunity to the disease. The organization says that serious side effects are exceedingly rare and may happen to one or two people per 1 million doses of the drug. “Getting vaccinated is much safer than getting the diseases they prevent,” says Vaccines.gov.
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