Is it safe to take acetaminophen when you have rsv?

Yes. There is no interaction here and the tylenol (acetaminophen) will help keep the child comfortable.
Yes. Respiratory syncytial virus (rsv) is basicly the "cold". In partially immune older folks it may only cause a runny nose & cough.In some susceptable infants it can go deep into the airways of the lungs & cause a bountiful outpouring of mucous & debris that cause lots of problems. Acetomenophen is a simple comfort med that helps in pain & fever management. It can be used safely in rsv.