An immediate allergic reaction means a reaction within 4 hours of getting vaccinated, including symptoms such as hives, swelling, or wheezing (respiratory distress).
These "immune effects" include pain where the needle went in, fever, chills, headache, fatigue and body aches. They can last for a few hours up to a few days. Acetaminophen or ibuprofen can ease these side effects, but these medicines should be taken after receiving the vaccine.Mar 16, 2022
Minor side effects are a normal sign that the immune system is mounting a protective response following vaccination, although they aren't universal.Feb 24, 2021
The known risks of COVID-19 illness and its related, possibly severe complications, such as long-term health problems, hospitalization and even death, far outweigh the potential risks of having a rare adverse reaction to vaccination like myocarditis or blood clots.Mar 16, 2022
You probably experienced COVID-19 vaccine side effects fairly quickly when you had your initial injections. The same is true for COVID-19 vaccine booster shots: Most people notice side effects within the first 24 hours. The symptoms typically only last a day or two. Some people don't notice any side effects.Nov 8, 2021
The most commonly reported side effects by individuals who received a booster dose of the Moderna COVID-19 Vaccine after completion of a two-dose primary series were pain, redness and swelling at the injection site, as well as fatigue, headache, muscle or joint pain and chills.Jan 7, 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 can affect your ability to do daily activities, but they should go away in a few days.
An immediate allergic reaction happens within 4 hours after getting vaccinated and could include symptoms such as hives, swelling, and wheezing (respiratory distress).
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
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
We found that reported reactions to mRNA vaccination were mostly mild in severity and transient in duration, and most reports were non-serious. Reactions and health impacts were reported more frequently in female than in male recipients, and in individuals younger than 65 years than in older individuals.Mar 7, 2022