Flu Shot

My husband went to the doctor today for a shot.  The nurse and doctor had just taken their second flu shot.  They said the public schools in their town are closed because of the flu.  The normal time people take a flu shot is in October.  It is good for three months.  The time people here get the flu is around February through April.  The flu shot taken in the fall isn't working any more and insurance won't pay for another one even though it is in a different calendar year.  Interesting.