Go take a "Titer test", if you've been vaccinated then it'll show. Then just get the shots you need... Varicella is very expensive and most places don't carry it, so do a titer first. If your going to CSN then go to the main page and enter titer test in the search box.. you'll find a sheet with the lab codes, then just take that to a doctor of your choice, they'll do a blood draw and you'll have your results in 2-5 days.