Heading into peak flu season, San Diego County is seeing its highest rates of flu cases in five years, public health department data shows. The big picture: A "quad-demic" of illness is hitting simultaneously this winter with high levels of influenza A,

Three teenagers are among 73 individuals who have died from the flu this season, according to San Diego County’s latest respiratory virus data, a statistic that has prompted public health officials to re-promote vaccinations.

Three local teenagers have died from the flu as of Thursday, none of whom were vaccinated, according to San Diego County. The county said a total of 73 people have died from the flu so far this season,