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Feb 20, 2024 · Developing a fever is a fairly common side effect of the COVID vaccine, according to the CDC. Even a high fever may not be a red flag — clinical trials for both the Moderna and Pfizer vaccines ...
Jun 25, 2021 · See a doctor if temperatures are at least 100.4°F (38°C) for infants, 102.2°F (39°C) for children, and 103°F (39.4 C) for adults. COVID-19 symptoms, including fever, can start anywhere from 2 ...
Dec 11, 2021 · 12 Hours After Vaccination. Other side effects may start within a few hours, or up to 12 hours after the shot. People commonly report systemic side effects, like fever, headaches, muscle aches, joint pain, chills, and fatigue. In the Pfizer-BioNTech vaccine trials, more than 77% of participants reported at least one systemic reaction.
Jan 4, 2024 · Moderna mRNA vaccine (children), 1-2 days after vaccination, lasting 1 day in 20-30 of 100 children when given as a booster dose. Fever occurs less frequently in an unvaccinated vaccine recipient. Novavax COVID-19 vaccine, 1-3 days after vaccination, lasting 1-2 days in 1-17 of 100 vaccine recipients. Fever occurs less frequently in older age ...
May 5, 2023 · Pain on the leg or arm where the shot was given. Swollen lymph nodes. Irritability or crying. Sleepiness. Loss of appetite. AGE GROUP. 4–17 YEARS. Side effects are more common after additional doses, and can include: Pain, swelling, and redness on the arm where the shot was given.
May 1, 2024 · Some people have no side effects from the COVID-19 vaccine. For those who get them, most side effects go away in a few days. A COVID-19 vaccine can cause mild side effects after the first or second dose. Pain and swelling where people got the shot is a common side effect. That area also may look reddish on white skin.
Sep 22, 2023 · How COVID-19 Vaccines Work. COVID-19 vaccines help our bodies develop immunity to the virus that causes COVID-19 without us having to get the illness. Different types of vaccines work in different ways to offer protection. But with all types of vaccines, the body is left with a supply of “memory” T-lymphocytes as well as B-lymphocytes that ...
