Everybody knows what the are, they are when you get bumps all over your body. The cause of the is the virus varicella. Males and females are both able to get the virus, but children ages five to six are the most likely to be infected.Like I said is caused by the virus varicella. is very contagious and unless you got it at birth one attack carries lifelong immunity. The chain infection is only present if a group of people come in contact with an infected person or anything the infected person has come in contact with. It is usually receive ....