The flu is an infection of the nose, throat, and lungs. The influenza virus causes the infection.
Influenza A; Influenza B
Influenza A usually arrives between early winter and early spring. Influenza B can appear at any time of the year. H1N1, or swine flu, is another type of influenza.
Most people catch the flu when they breathe in tiny droplets from coughs or sneezes of someone...Read more