We are planning a long journey in 10 days time. We live in Africa, and will be flying to USA. We are relief workers, and this is an annual trip. It will be the first time my parents in law meet their 1 year old granddaughter. Yesterday, we spent all afternoon at the birthday party of a girl who has this morning woken up with chickenpox. I read that contagious = 1-2 days before the rash, so we were there right at the worst time. Also, I read that contagious = being in the same room for 15 minutes +. We were. Also, that incubation period is 7-21 days. I am totally panicking. Our journey will take 32 hours, 4 flights. We can't change the flights. We have two kids, one aged one, the other three. What on earth should I do? Am I right to be totally panicking? How likely is it that my two will get it?