In this photo illustration vials with Pfizer-BioNtech, Moderna and AstraZeneca covid-19 vaccines currently available in Slovenia. (Photo illustration by Luka Dakskobler / SOPA Images / LightRocket via Getty Images)
New research from the US Centers for Disease Control and Prevention suggests that people who receive Moderna’s COVID-19 vaccine may experience more side effects than those who receive Pfizer / BioNTech’s vaccine.
The agency’s findings come from a study published in the online journal JAMA.
Researchers collected data from December 2020 to February 2021 from CDC’s V-Safe monitoring system, which monitors and reports adverse reactions to the COVID-19 vaccines through self-report surveys.
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The data showed that 75% of Moderna recipients reported side effects after receiving one dose of COVID-19 vaccine, compared to 65% of Pfizer / BioNTech recipients. Side effects include injection site pain, fatigue and headache.
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Researchers noted that study participants represented less than 10% of the total number of people who received their first vaccine during the study.
CDC officials said that mild side effects are expected when you get the COVID-19 vaccine, and that the side effects are a normal sign that your body is building up protection.
In addition to a sore arm, people may experience fever and flu-like symptoms, such as fatigue, aches, colds, or headaches. According to CDC officials, it will take about a day. The reactions are a sign that the immune system is recovering.
The vaccines are regularly monitored for their safety.
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Concerns began to increase this week about side effects of the Johnson & Johonson vaccine, which were not included in the study.
Georgia health officials have temporarily halted vaccinations of the Johnson & Johnson vaccine at one location in northern Georgia after eight people had “adverse reactions” on Wednesday. At least three other states – North Carolina, Iowa and Colorado – have reported adverse reactions from people who have received the Johnson & Johnson vaccine in some places. One of the eight people at the vaccination site in Cumming, Georgia, has been evaluated and released to a hospital, the Georgia Department of Public Health said Friday. The others were monitored and sent home.
There is no reason to believe that there is anything wrong with the vaccine, and people who have received it need not worry, said Dr. Georgia Health Commissioner Kathleen Toomey said.
According to the CDC, more than 68 million Americans are fully vaccinated, representing 20.5% of the total U.S. population.
This story was reported from Los Angeles.