Avian influenza

Influenza is a contagious respiratory illness caused by influenza viruses. It can cause mild to s...

Influenza is a viral infection that attacks your respiratory system — your nose, throat and lungs...

Seasonal influenza is characterized by a sudden onset of fever, cough (usually dry), headache, mu...

Influenza Updates: · Seasonal flu activity varies by region, but is increasing in some areas of t...

Influenza (flu) is a highly contagious viral infection of the respiratory tract that can cause se...