Poliomyelitis (Polio) in Children
What is polio in children?
Polio is a very contagious disease caused by a virus. Most children who are infected
with polio have no symptoms. A few have mild symptoms. The virus is most known for
attacking the nervous system and causing paralysis. But very few children with polio
develop paralysis. Polio is now very rare in the U.S. because children are vaccinated
What causes polio in a child?
Polio is caused by poliovirus. There are 3 types of the virus. It often spreads through
contact with infected feces (stool). This often happens when children don't wash their
hands or don't wash them correctly. It can also happen from eating or drinking food
or water that has the virus. It can be spread when an infected child coughs or sneezes
infected droplets into the air. The virus can also be in a child’s stool for several
weeks. Children are most contagious right before and right after symptoms start.
Which children are at risk for polio?
A child is more at risk for polio if they're in an area where polio is still active.
Polio is not active in the U.S. But polio is still a problem in developing countries
that have widespread poverty and less access to the polio vaccine. This includes a
few countries in Africa and Asia. International healthcare groups work to get more
people vaccinated to get rid of the polio virus worldwide. A child is at risk if they
travel to any of these areas, or have contact with someone else who has. Polio is
even more of a risk for babies and children during the summer and fall in these areas.
Before traveling to countries where polio is active or at risk for outbreaks, check
with the CDC.
What are the symptoms of polio in a child?
Most children with polio have no symptoms at all. This is called an inapparent infection.
The other types of polio are:
Abortive. This is a mild illness that doesn’t last a long time.
Nonparalytic. This is also a milder illness that doesn’t last a long time.
Paralytic. This illness can cause severe symptoms and long-term problems.
Symptoms can be a bit different for each child.
The most common symptoms of abortive polio can include:
Less appetite than normal
Upset stomach (nausea) and vomiting
Not feeling well all over (malaise)
The most common symptoms of nonparalytic polio can include the same symptoms as abortive.
Then after symptoms start to go away, the child may have:
Pain of the muscles in the neck, torso, arms, and legs
Stiffness in the neck and along the spine
The symptoms for paralytic polio are the same as above. They can also include:
Most children who have paralysis will get some of their strength back over time. Some
children will return to normal. A small number of children will die from the disease.
The symptoms of polio can seem like other health conditions. Have your child see their
healthcare provider for a diagnosis.
How is polio diagnosed in a child?
The healthcare provider will ask about your child’s symptoms and health history. They
may also ask about your recent travel to countries where polio is active. The provider
will give your child a physical exam. Your child may also need tests. They may include:
Virus cultures. The provider will take samples of stool, and fluid samples from the throat. Viruses
from the samples are grown in a lab and checked with a microscope.
Blood test. This is done to check for polio antibodies.
Spinal tap (lumbar puncture). The provider puts a needle into the lower back, into the spinal canal. This is the
area around the spinal cord. The pressure in the spinal canal and brain can then be
measured. The provider removes a small amount of cerebral spinal fluid (CSF). It's
sent for testing to find out if there is an infection or other problems. CSF is the
fluid around your child's brain and spinal cord.
How is polio treated in a child?
There is no medicine to cure the virus. But treatment is done to help aid a child’s
comfort and recovery from the virus. This is called supportive treatment. This kind
of treatment may include:
Pain medicine such as acetaminophen
Bed rest until fever is lower
A healthy diet
Very little physical activity
Hot packs or heating pads for muscle pain
What are possible complications of polio in a child?
Possible complications of paralytic polio can include permanent paralysis of certain
muscle groups. This may include the leg muscles, or the muscles used for breathing.
How can I help prevent polio in my child?
The vaccine is the main way to prevent polio. In the U.S., children are given inactivated
polio vaccine (IPV). This is given by a shot. IPV can’t cause polio. It’s safe for
a child with a weak immune system. Oral poliovirus vaccine (OPV) is no longer given
in the U.S. OPV contains a live virus and may be less safe than IPV for some children.
The IPV polio vaccine is given at these ages:
Between 6 and 18 months
Between ages 4 and 6
Your child may need a polio booster within 12 months before travel to a country where
polio is active. Before traveling to countries where polio is active or at risk for
outbreaks, check with the CDC.
When should I call my child’s healthcare provider?
Call the healthcare provider if:
Your child has not had the full series of polio vaccines
You are planning travel to a country with polio
You have been to a country with polio and your child has symptoms
Your child had close contact with a person sick with polio
Key points about polio in children
Polio is a very contagious disease caused by a virus. Polio is now very rare in the
U.S. because of the polio vaccine.
Most children who are infected with polio have no symptoms. A few have mild symptoms.
In rare cases, the illness can cause severe symptoms and long-term problems.
The virus often spreads through contact with infected feces (stool). It can be spread
when an infected child coughs or sneezes infected droplets into the air.
A child is more at risk for polio if they are in an area where polio is still active.
Polio is still a problem in developing countries that have widespread poverty and
less access to the polio vaccine.
There is no medicine to cure the virus. Treatment is done to help aid a child’s comfort
and recovery from the virus.
The vaccine is the main way to prevent polio. Your child may need a polio booster
within 12 months before travel to a country where polio is active.
Tips to help you get the most from a visit to your child’s healthcare provider:
Know the reason for the visit and what you want to happen.
Before your visit, write down questions you want answered.
At the visit, write down the name of a new diagnosis, and any new medicines, treatments,
or tests. Also write down any new instructions your provider gives you for your child.
Know why a new medicine or treatment is prescribed and how it will help your child.
Also know what the side effects are.
Ask if your child’s condition can be treated in other ways.
Know why a test or procedure is recommended and what the results could mean.
Know what to expect if your child does not take the medicine or have the test or procedure.
If your child has a follow-up appointment, write down the date, time, and purpose
for that visit.
Know how you can contact your child’s provider after office hours. This is important
if your child becomes ill and you have questions or need advice.