Since the pneumonia shot is good for 5 years, and the H1N1 tends to hit the lungs hard, I wonder if those that get milder cases may have had pneumonia shots within the last 5 years.
Also, FWIW, about 3 years ago my sister was in the hospital in ICU, she had high fever, pneumonia and her kidneys were being infected. We were talking about this last weekend and we think its possible that she may have had an early case of H1N1. We think its been around a while, but, no one had a name for it.
I would be very interested in finding out the numbers of people who got the pneumonia shot , & if they were protected from the flu . And if they were protected how long of a protection period it would be .