The bird flu outbreak has spread to all 50 states, infecting dairy cattle, poultry farms and 61 humans across the country.

The CDC has revealed the red flags it is monitoring for that suggest that bird flu was about to become the world's next pandemic.

As flu season ramps up in the U.S., influenza is not as simple as it first appears, with several different strains in play.

According to the CDC, symptoms of Bird Flu include eye redness, upper respiratory symptoms, pneumonia that requires hospitalization, a fever of 100ºF or higher, a cough, sore throat, runny nose, ...