Russ
Hi, Katherine. Yes, scarlet fever is contagious. I had it when I was a kid in about 1950. I was quarantined to my room (couldn't even go to the rest of the house) and only one member of my family was permitted in my room to give me medications (penicillin). And they posted a "Quarantined" sign on our front door. It was not a fun time. --Russ