How to prevent chicken pox from someone who has one?
First off chicken pox are an airborn desease so you should stay away from her but if you do get them there not that bad if you ignore it and drink lots of chicken noodle soup and a nice luke warm bath does wonders with the itching and its basicly your safest bet to close your sisters or your own door to minimise the possibility that you may catch it but if it were me i would go catch them so you dont have to worry about them later on in life