Hi, My son is 2 1/2 years old. On Monday there was a sign up at his nursery that said there was one child off sick with chickenpox. I've been looking on his body every day since then for spots and nothing has came out as of yet. I'm a bit concerned because I have a younger son who is four months old. Anyway today my 2 1/2-year-old has woke up with a really runny nose and bad cold. I'm just wondering could this be the start Of chickenpox? Not really sure what to think and should I be worried about my four month old?