I have gotten strep throat 3 times in the last month!!! first round of antibiotics was a mild one...I got it back 2 days after finishing it, (although, I didn t through out my tooth brush) The next time I went back to the Dr. I got a stronger anti biotic, this time got new tooth brushes, also my 2 year old got it, and we were both taking an anti biotic at the same time. So I finished that med, a day an a half ago....well bingo its back!!??