Everybody knows what the chicken pox are, they are when you get bumps all over your body. The cause of the chicken pox 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 chicken pox is caused by the virus varicella. Chicken pox 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 received in the cooler months of the year and goes away by itself in two to three weeks.