Dr Japra has given me a list of the vaccination programme that muggle children follow, i.e., the age at which they receive each shot for each specific disease. He says that he would prefer the muggle method, but he agrees that disease protection is more important. Therefore, if we have to vary from the schedule by more than a month for each shot if supplies of muggle vaccine are more problematic or unobtainable, we have their permission to substitute the wizarding potion.