How sniffly/ill is okay to attend a baby class?

I attend a baby sensory from birth class. Last week i didn't attend because the night before I had a temperature but didn't amount to anything more. And this week I'm going to skip because I've woken up with a sore throat and a tiny sniffly nose- but what would other people do? I don't know if I'm being ott- if the class wasn't from birth then I would have definitely gone. FTM so what's the etiquette on these things? Thanks