“Could be that many have had this flu without knowing it.”
You can develope immunities without ever having been sick. Your body does it every day.
You can develope immunities without ever having been sick. Your body does it every day.
The last time I succumbed to something called a flu was some twenty years ago. And my job brought me in to contact with many people. I probably had many a flu but would get no more than some cold symptoms.
I'm sure you build many immunities in a place like NYC. In fact, I'd like to see statistics comparing the rate of reported H1N1 cases in urban versus rural areas.