Some even have no symptoms.

If you do have symptoms, they could show up two

to 14 days after exposure.

They're most likely to be similar to a regular cold,

the flu, or seasonal allergies, like a fever,

headache, fatigue, sore throat, and runny nose.

Coughing and shortness of breath are common,

according to the Centers for Disease Control and Prevention.

The older you are, the more likely you are to experience

severe forms of these symptoms.

Some cases have gastrointestinal symptoms, such as diarrhea.

In more extreme cases and for people

with underlying health conditions,

like heart disease or diabetes, you can develop pneumonia,

frequent or high fever, persistent cough,

and signs of respiratory distress,

like shortness or breath and chest pain.

A small percentage of cases progress

to acute respiratory distress,

difficulty breathing, chest pain, and pressure.

Confusion, extreme fatigue,

persistent pain or other severe symptoms

require immediate medical attention.

The result could mean shock, organ disfunction,

or heart failure.

If you have severe symptoms, it's definitely time

to get in touch with a healthcare providers.

But with milder symptoms, it's a good idea

to call your primary care doctor first

instead of rushing to the emergency room.