If you have had a severe allergic reaction to any ingredient in the Pfizer-BioNTech COVID-19 vaccine (such as polyethylene glycol), you should not get this vaccine. If you had a severe allergic reaction after getting a dose of the Pfizer-BioNTech COVID-19 vaccine, you should not get another dose of an mRNA vaccine.
Side effects from both the Moderna and Pfizer COVID-19 vaccines are more common after the second dose. This is because your immune system recognizes the virus spike protein from the first dose of the vaccine and mounts a stronger response.Oct 28, 2021
Allergic reaction or anaphylaxis was reported in 0.3% of participants after partial vaccination and 0.2% of participants after full vaccination. Meaning These findings suggest that some individuals experience more adverse effects after COVID-19 vaccination, but serious adverse effects are rare.Dec 22, 2021
The most commonly reported side effects were pain at the injection site, headache, fatigue, muscle aches and nausea. Most of these side effects occurred within 1-2 days following vaccination and were mild to moderate in severity and lasted 1-2 days.Feb 16, 2022
This is normal and expected, but it doesn't happen to everyone. Even if you feel worse after the second shot, the side effects should still resolve within a few days.May 3, 2021
Side effects after your second shot may be more intense than the ones you experienced after your first shot. These side effects are normal signs that your body is building protection and should go away within a few days.
Serious adverse events, while uncommon (<1.0%), were observed at slightly higher numerical rates in the vaccine study group compared to the saline placebo study group, both overall and for certain specific adverse events occurring in very small numbers.Feb 16, 2022
The most commonly reported side effects were pain at the injection site, tiredness, headache, muscle pain, chills, joint pain, and fever.Feb 16, 2022
Side effects after the COVID-19 vaccine are caused by your immune system. But a lack of side effects doesn't mean your COVID-19 vaccine didn't work.May 26, 2021
These side effects happen within a day or two of getting the vaccine. They are normal signs that your body is building protection and should go away within a few days.
A: Yes. The FDA has determined the totality of available data provides clear evidence that Janssen COVID-19 Vaccine may be effective in preventing COVID-19. The data also show the known and potential benefits outweigh the known and potential risks of the vaccine.Feb 16, 2022
For example, the Moderna vaccine's side effects last roughly 1 to 3 days for most people. If your symptoms last longer, get worse, or you develop new symptoms, like a cough, you should get medical care right away.Oct 28, 2021