I have a 5 week old at home with a 5 and 3 year old. The older ones have received the seasonal flu mist in the past month. Now it is about time to get the H1N1 flu mist. I have recently heard that since the mists contain a weakened form of the virus, an infant should not even be exposed to those who have received it. Is this a legitimate concern and should I proceed with plans to get the older children vaccinated with the mist?