By Robert Bazell, NBC News Chief science correspondent
We received a lot of email today about last nights report on childhood immunizations. Several people wanted clarification of the statement by the state epidemiologist of Minnesota -- that of five children in that state who contracted meningitis in the past three years from the bacteria called Hib-- three had not been vaccinated because their parents declined. Many of you asked about the other two.
Since it did leave confusion we should have put the information in the report. Of those two children one was five months old, too young to begin the regular immunizations and the other had a compromised immune system that made the vaccine ineffective in the child. I hope this makes the situation more clear.