Vaccine (Shot) for Polio


How to pronounce Polio: [POH-lee-oh]

Four doses of the polio shot are recommended by doctors as the best way to protect against polio.

When should my child get the polio shot?

Your child will need one dose at each of the following ages:

Why should my child get the polio shot?

  • Protects your child from polio, a potentially serious disease.
  • Protects your child from developing lifelong paralysis from polio.

The polio shot is safe.

check circle solid icon

The polio shot is very safe, and is effective at preventing polio. Vaccines like any medicine, can have side effects. These are usually mild and go away on their own.

What are the side effects?

  • Redness, swelling, or pain where the shot was given
heart icon

Prepare for your child's vaccine visit and learn about how you can:

  • Research vaccines and ready your child before the visit
  • Comfort your child during the appointment
  • Care for your child after the shot
Before, During, and After Shots
Crutches icon.

What is polio?

Polio is a crippling virus that can invade the brain and spinal cord, paralyzing or even killing children. Paralysis caused by polio occurs when the virus replicates in and attacks the nervous system.  It can cause lifelong paralysis (can’t move parts of the body), and it can be deadly.

It most often sickens children younger than 5 years old.

What are the symptoms of polio infection?

Most people who get infected with poliovirus do not have any symptoms. Some people (25 people out of 100) will have flu-like symptoms. These symptoms usually last 2 to 5 days.

In rare cases, poliovirus infection can be very serious. About 1 out of 200 people will have weakness or paralysis in their arms, legs, or both. This paralysis or weakness can last a lifetime.

Is it serious?

The risk of lifelong paralysis is very serious. Even children who seem to fully recover can develop new muscle pain, weakness, or paralysis as adults, 15 to 40 years later.

About 2 to 10 children out of 100 who have paralysis from polio die because the virus affects the muscles that help them breathe.

How does polio spread?

Poliovirus is very contagious. It spreads through contact with the stool (poop) of an infected person or droplets from a sneeze or cough. If you get stool or droplets from an infected person on your hands and you touch your mouth, you can get infected. Also, if your child puts objects, like toys, that have stool or droplets on them into their mouth, they can get infected.

An infected person may spread the virus to others immediately before and usually 1 to 2 weeks after developing symptoms. The virus may live in an infected person’s stool for many weeks. He or she can contaminate food and water when they touch it with unwashed hands.

Do people still get polio in the United States?

No, the United States has been polio-free for more than 30 years, but the disease still occurs in other parts of the world. It would only take one person with polio traveling from another country to bring polio back to the United States.

globe europe icon

Children who will be traveling to a country where the risk of getting polio is greaterexternal icon should complete the series of shots before leaving for their trip. If a child cannot complete the routine series before leaving, a polio accelerated schedule is recommended.

Follow the vaccine schedule

The Centers for Disease Control and Prevention, Academy of Family Physicians, and the American Academy of Pediatrics strongly recommend children receive all vaccines according to the recommended vaccine schedule.

Page last reviewed: August 2, 2019