How Vaccines Work

Vaccines work by teaching our bodies how to recognize and fight off infections from things like viruses and bacteria. Although vaccines can make you feel a little sick, this is usually a good sign. There are special cells in the body that are trained to fight infection, and the vaccine helps them to train better. Feeling sick after a vaccine...READ MORE

No vaccine is 100% effective at preventing illness, but vaccines provide strong protection against serious illness, hospitalization, and death. You can still pass the disease on to another person after you’ve been vaccinated, which is why if you have symptoms of COVID or flu, you should consider staying home or think about wearing a mask that covers your nose and...READ MORE