What If My New Born Catches The Flu From Me?

hey. i've been really sick in the last week. had a bad case of the flu. my husband's been sick as well. and my 18 month old daughter threw up bad one night, but otherwise she hasn't seemed to get too sick or anything. and my 11 week old son. i'm really worried about him catching the flu from me. he hasn't seemed to get sick yet either. although he has throwen up his milk a couple times in the last day and been a little cranky, but otherwise seems ok. but i'm just worried. what if he does get sick? since he's so young, how dangerous is that for a new baby to get sick, would he be ok?