+ Follow

• 431 views

Influenza or most commonly known as "the flu" or "grippe" is an illness caused by a virus that infects the upper respiratory tract. There are two types of influenza – type A and B, Flu infects the th...

Influenza or most commonly known as "the flu" or "grippe" is an illness caused by a virus that infects the upper respiratory tract. There are two types of influenza – type A and B, Flu infects the throat, nose, lungs, bronchial tubes, and even the middle ear. There are vaccines for the flu but since there are over two hundred different viruses that can cause flu, it can be very difficult to achieve success in fighting against these types of flu viruses.