SAN DIEGO–An 83-year-old San Diego man died February 5, the County Health and Human Services Agency reported today. He had underlying medical conditions.

Additionally, a total of 616 lab-confirmed flu cases were reported the week ending Feb. 13, more than double the number from the previous week when 266 cases were diagnosed.

“Influenza activity in the region is intensifying though it is still below last year’s level,” said Wilma Wooten, M.D., M.P.H., County public health officer. “It is not too late to get vaccinated. The vaccine is safe and effective and very well matched with the strains of flu that are circulating this season.”

The Centers for Disease Control and Prevention recommends that everyone 6 months and older get a flu vaccine every year. The vaccine is safe and effective. It takes about two weeks for immunity to develop.

This season’s flu vaccine offers protection against several strains of the flu including influenza A H3N2, pandemic H1N1-like, and influenza B strains.