Learn the difference between symptoms of the flu and COVID-19.

Learn about the COVID-19 vaccine for children, including what it is and why they should get it.

Learn about the vaccine for COVID-19.

Varicella vaccine can prevent chickenpox. Chickenpox can cause an itchy rash that usually lasts about a week. It can also cause fever, tiredness, loss of appetite, and headache. It can lead to skin infections, pneumonia, inflammation of the blood vessels, and swelling of the brain and/or spinal...

Polio vaccine can prevent polio. Polio (or poliomyelitis) is a disabling and life-threatening disease caused by poliovirus, which can infect a person's spinal cord, leading to paralysis. Most people infected with poliovirus have no symptoms, and many recover without complications...

In most cases, HIV causes only a few weeks of flu-like symptoms. But if HIV isn't treated, you're more likely to get sick with opportunistic infections. HIV weakens your immune system so it can't fight off these infections. Preventing opportunistic infections is an important part of caring for yourself when you have...

Your infant (newborn to 12 months) is less likely to be uncomfortable or upset after getting a shot if they are not hungry or tired. You can also help your baby during and after the shot by comforting them. The following tips may help you. See that...

Easily find information on many medical conditions and health topics — including colds and flu, chronic conditions, heart health, and sleep problems.

Provides links to info for parents. Includes information on healthy eating, protecting your child from infections, immunizations, choosing child care, healthy habits for kids, helping your child avoid drugs, and helping your child with stress.

Briefly discusses symptoms and possible causes of abdominal pain, such as peptic ulcer disease, indigestion, appendicitis, and stomach flu. Offers interactive tool to help decide when to seek care. Also offers home treatment tips.

Briefly discusses symptoms of sore throat caused by virus and bacteria infections and irritants. Covers common cold, mononucleosis (mono), strep throat, and flu. Covers symptoms such as swollen glands and pain. Offers interactive tool to help decide when to seek care. Also offers home treatment tips.

Briefly discusses possible causes of abdominal pain in children 11 and younger, including stomach flu, urinary tract infection, constipation, and appendicitis. Offers interactive tool to help decide when to seek care. Also offers home treatment tips.

Offers tips to prevent illness and accidental injuries in babies and young children. Covers SIDS. Discusses common safety hazards. Also discusses healthy habits such as safe food preparation, using car seats, and immunizations. Covers safe baby products.

What is neutropenia? Neutropenia (say "noo-truh-PEE-nee-uh") means that your blood has too few white blood cells called neutrophils. White blood cells are an important part of your body's immune system. Neutrophils help protect your body from infection by killing bacteria. What causes it? Neutropenia is often caused by...

A viral test is done to find infection-causing viruses. Viruses grow only in living cells. Viruses cause disease by destroying or damaging the cells they infect, damaging the body's immune system, changing the genetic material ( DNA) of the cells they infect, or causing inflammation that can damage an organ. Viruses...

Discusses shingles, a condition caused by the virus that causes chickenpox (herpes zoster). Discusses who is most likely to get it. Describes how shingles rash causes pain and the treatment for it. Includes info on the shingles vaccine.

What is mumps? Mumps is a contagious viral infection that can cause painful swelling of the salivary glands, especially the parotid glands (between the ear and the jaw). Some people with mumps won't have gland swelling. They may feel like they have a bad cold or the flu instead. Mumps usually goes away on its own in...

Offers links to information on health screenings and on reducing risk factors for injury and disease.