It is rare, but infectious disease specialists say humans can contract bird flu.

The disease can spread when a person has close contact with an infected animal.

Symptoms of the virus typically include fever, fatigue, cough, sore throat, stuff nose and nausea. They also may get conjunctivitis, often referred to as “pink eye.” Bird flu in humans can be deadly.

In around 50% percent of known cases, the person has died, according to the Centers for Disease Control and Prevention.

However, when detected early, the virus is treatable.

“People that have immunocompromising conditions or are pregnant, the elderly, may have some type of chronic condition such as the heart, diabetes, and especially younger infants that have not developed their immunity, may be at risk for more severe illness with any type of influenza, including the bird flu,” said Dr. Lysette Cardona. “So it’s important that we are vigilant when you have that type of illness with those types of morbidities.”

Since the virus isn’t common, it’s important to tell your doctor right away if you suspect you were exposed to the virus.