'Serial' flu shots still better than none at all: researchers

Saving the flu shot for “when you really need it” is like playing Russian roulette, says one Ontario researcher who compared more than two dozen studies about “serial vaccinations.” Annual flu shots remain the recommendation among doctors, despite growing evidence that repeated vaccination may weaken the body’s ability to fight the influenza viruses. That research is no reason to skip out on the shot altogether, said Jeff Kwong, a scientist with Clinical Evaluative