The vaccine will have side effects for some people. A vaccine
activates a person’s immune system. It causes the immune system to create antibodies
fight off a specific virus or bacteria. When your immune system goes into action,
may feel your immune system kick into gear as though it’s fighting an illness. This
not mean you are infected with an illness. It means that your immune system is
People getting the mRNA COVID-19 vaccines often have soreness where
the shot was given, tiredness, headaches, muscle and joint aches, chills, and fever
a day or two. Fewer people have redness and swelling at the injection site. These
all signs that your immune system is working on its defense. You can get these kinds
effects after many kinds of vaccines. But these symptoms should last a short time.
comparison, COVID-19 symptoms can be severe and last much longer, and cause
complications, long-term illness, and death. The FDA approval process makes sure that
the discomfort and risks of a vaccine outweigh the risks and complications of the
illness it helps prevent.