Family sick and LO is 3 weeks old. FTM

Rae
My husband is coming down with a sore throat and congestion. (I may be getting it too). Our LO is 3 weeks old. Does anyone have any advice as to keeping baby healthy? I am breastfeeding, so that should help with the immune system and we are staying in separate rooms right now. Does anyone have any advice if he were to catch a cold as well? 
Thank you in advance!! Trying not to worry!