Hi I am 22 weeks pregnant. One of my friend`s son has chicken pox. He had been to doctor and should be ok withing 2 days. We were planning for a vacation in snow on 14th feb. I had chicken pox when I was child. I heard one gets it once in lifetime. Is it true. My husband I are planning to cancel this trip as chicken pox is contagious. Was it a right decision. Please advise. I know my friend is going to feel bad but I can`t help it.