Okay, I was at a doctor appt. after 2 of my boys had positive strep tests. This was a couple of days later, and I'd had a low-grade fever the day before, and a sore patch developed in my throat. The doc told me he was going to prescribe antibiotics and not bother with a test because of the research indicating most people with family exposure who present with symptoms go on to develop strep, so he would prescribe them, [pause], so I offered "prophylactically", but he rejected it, saying, no, "just in case". So here's my question: "prophylactically", in my understanding, means as a preventive measure. I assume his objection was that I was presumed to be infected already, and therefore the treatment couldn't be preventive. Soooo, is there a word that means "just in case" because it probably is the case? Thanks in advance! :0)