Adult side effects for vaccines include mild fever, chills and feelings of tiredness according to Vaccines.gov, which is managed by the Office of Infectious Disease and HIV/AIDS Policy, U.S. Department of Health and Human Services.
“We are asking people to take a vaccine that is going to hurt,” Dr. William Schaffner, a professor of preventive medicine and health policy at Vanderbilt University Medical Center, told Kaizer Health News. “There are lots of sore arms and substantial numbers of people who feel crummy, with headaches and muscle pain, for a day or two.”
He said that convincing people who have those symptoms to come back for a second dose in the next few weeks could prove difficult.
According to Saad Omer, director of the Yale Institute for Global Health, the way health experts explain the side effects to the public will be important.
“There’s evidence that suggests that if you frame pain as a proxy of effectiveness, it’s helpful,” he said. “If it’s hurting a little, it’s working.”
Data from Pfizer released earlier this week indicates that the COVID-19 vaccine is 90% effective at preventing the disease caused by the coronavirus. It’s anticipated that the pharmaceutical company will file an emergency-use application with U.S. regulators by the end of the month.