@Medicosaddaalmost 8 years ago
Why common cold is so common? . . . Can you answer this simple question.... .. Comment below your answers...
Other commentsSign in to post comments. You don't have an account? Sign up now!
almost 8 years ago
Cos it can be easily spread. For affected individuals to unaffected ones
almost 8 years ago
Actually on exposure of pathogen memory cells makes memory of only 15 days hope u got it 😊😊😊😊
