How do you know if someone has the flu or COVID-19? What are the differences between these two illnesses? Here's what you need to know.

When you have COVID-19, lying on your belly can help your lungs work better. It can help get more oxygen into your lungs more easily. It can help prevent lung injury.

The best prevention is to not have contact with the SARS-CoV-2 virus.

2019 Novel Coronavirus (2019-nCoV) is a virus that causes a respiratory illness. Here's what you need to know to protect yourself.

If you have recovered from COVID-19, you may be able to donate blood plasma. This is a procedure like donating blood.

If you are sick with COVID-19 symptoms, stay home.

Osteomyelitis is an infection of a bone by a germ (bacteria or fungus). In children, infection in the long bones of the arms and legs are most common. Read on to learn more about this condition, including symptoms, diagnosis, and treatment.

There is no vaccine to prevent Zika infection. If you are planning a pregnancy, you'll need to take steps to protect yourself and your partner.

To prevent Zika infection during pregnancy, you need to protect yourself from mosquitoes and use protection during any sexual activity.

If you travel to areas where Zika is currently active, you are at risk for a Zika infection.