My April baby had be sick soooo much

It started about a month ago with salmonella... complete mystery of how he got that. Then RSV. Took about 3 weeks to recover. Last weekend had several bloody diapers, took to ER was told blood work showed possibly a viral infection (waiting on poop sample results that’s should be in today) now the past two days has been severely congested with a runny nose. Poor fella can’t catch a break. Any other mamas going through a similar situation? I feel so bad for him. Wish I could be a SAHM so he did have to be exposed to all the germs at daycare