Effectiveness of the flu vaccine is not optimal, the vaccine still have vents millions of illnesses and tens of thousands of hospitalizations in the united states. The San Francisco Public Health department reminds everyone it takes about two weeks for antibodies to develop in the body to protect you so they say, dont wait any longer and the flu mist nasal vaccine has not been very effective against the h1n1 vaccine and is not being recommended this season. The flu widespread now across most of the u. S. , as you can see on the map from the cdc, its widespread in almost every state. Cdc officials were briefed today on how to reduce the spread and how to help communities where theres a shortage of vaccines or medication. This years influ wenza seas is proving to be particularly difficult. Reporter the cdc says this years virus is incredibly difficult to work with, treat and prevent. With a high number of hospitalizations and deaths, 42 adults under the age of 65 in california have died