Why do some people get side effects after COVID vaccines? - New York Post
Why do some people get side effects after COVID-19 vaccines.Temporary side effects including headache, fatigue and fever are signs the immune system is revving up — a normal response to vaccines.“The day after getting these vaccines, I wouldn’t plan anything that was strenuous physical activity,†said Dr.White blood cells swarm to the site, prompting inflammation that’s responsible for chills, soreness, fatigue and other side effects.
This rapid-response step of your immune system tends to wane with age, one reason younger people report side effects more often than older adults.A tiny percentage of people who got vaccines made by AstraZeneca and Johnson & Johnson reported an unusual type of blood clot.
That’s why you’re asked to stick around for about 15 minutes after getting any type of COVID-19 vaccine — to ensure any reaction can be promptly treated