My ds of 17 months has just completed his first course of antibiotics. friends have said this will have killed all the good bacteria in his stomach and live yogurt could remedy this. Then my mum comes along and says in her day you weren't allowed to get your vaccinations if you had been on antibiotics in last 10 days. He is due for MMR this week. If anyone has heard of either these bits of information before and has any views on their validity they would be gratefully received.