Tips on not getting 3 month old sick?

Came down with a pretty horrible stomach bug. Been throwing up all day... Along with all of my sisters , father and best friend. (We spent the weekend together)

My 3 month old was around everyone and now that ive come down with it I’m super worried.

Any tips on how to not pass it over to my sweet boy? :( it is HORRIBLE.

also..any tips on how to cope with caring for him while I feel miserable? My husband had him all day but his best friend is getting married tonight and I made him go.

Thanks!!

Sincerely,

A very tired and sick mama