You wanna keep yourself safe and others safe...but mainly yourself. I'd give it 2 weeks at least..It sucks because of how addictive BJJ is, but there's nothing worse than skin illnesses, they are pretty easy to contract even in the cleanest settings.
"Blame the IBJJF when, in 30 years you see an academy that nails the phrase, "A Red belt is a Junior black belt that hasn't died yet" on the far wall."