There are many reasons cause diseases in human like fever,dengue, etc so that we need to prevent it. Fristly, you should have a balanced diet. You should drink a lot of water, not eat fat, meat, junk food and fast food. Especially, you mustn't smoke, drink beer, wine and whiskey because that will make you are the pressure. The second way. I should do exercises. Because this makes you stronger, taller and healthier. Last but least, you should sleep enough. You should sleep eight hours a day and go to early because it is good for skin, more optimistic, and alway keep the smile on your slips. Instead of, you go online, you should read the book before go to bed. Because it will take go to have dreams beautifier. In conclusion, there are have a good health.