An acquaintance I know told me that if your dr gives you a big enough dose of the varicella vax, then you can be immune for life, rather than the 5-10 years. I have no idea where she got her info (her dr I imagine), but it doesn't sound like credible info to me, but I didn't want to call her out on it w/out info to back it up. I looked on the cdc website, but I couldn't find the info (imagine that!), so if somebody can find info that it either is or isn't true, that would be great. TIA!