AIDS is very dangerous disease because people will die surely, if they have its virus. Because it is moved in blood and spit , People who have virus never kiss and blood donation. Because there are many its germ carrier, we have to care about meeting boy friendand girl friend. Woman who have a its virus never have a baby because its virus move their baby. But it don’t move sake hands, food, and tableware. Therefore we can live together. Its symptoms is having fever, chill, cold, losing weight, a skin disease, and malignant tumor. Nothing is to cure.