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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.

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

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

A deep vein thrombosis (DVT) is a blood clot in a large vein deep in your leg, arm, or elsewhere in the body. The clot can separate from the vein, travel to the lungs and cut off blood flow. This is a pulmonary embolism (PE). Pulmonary embolism is very serious and may cause death.

Certain infections can spread from person to person. This is why your friend or family member may be put in a special room at the hospital. Here's what you need to know to keep you and your loved one safe.

E-cigarettes are devices that allow users to breath in liquid that has nicotine in it. New health concerns have been raised about these devices. Here's what you need to know.

If your blood pressure drops too low, your brain may not get enough oxygen-rich blood. Your body responds by losing consciousness briefly. You also slump or fall down. This problem is called syncope, fainting, or a blackout.

Syncope (fainting) has many causes. Sometimes it's not serious. In other cases, it's a sign of a heart problem. Read on to learn more.

Presbyopia is the loss of close-up focusing. With age, the lens in the eye hardens and can't change its shape as easily. It then can't focus clearly on close objects. This makes them look blurry.