My older children were playing in the playground today with some friends and I just discovered that the youngest aged 1 has chicken pox. They didn't play with her but with her older siblings. I am not sure if the older ones have had it before. My older children had it about 5 years ago but my question is if they have had direct contact with the CP now could they pass it to my 3 month old. I called nurse on call and they were unsure.