I have flu and i need to prevent it from coming again please help.

Wear mask,wash hands: Wearing a mask and washing one's hands frequently are two things that help stop the spread of respiratory infections such as the flu. Also, ask sick people to stay home. One can stay away from crowded places, avoid shaking hands, and try not to touch too many objects. A person can still get the annual flu shot (prevents 3 or 4 flu strains), even if he already caught one strain of the flu.