When's the Perfect Time to Get a Flu Shot? - The Atlantic
For about 60 years, health authorities in the United States have been championing a routine for at least some sector of the public: a yearly flu shot. That recommendation now applies to every American over the age of six months, and for many of us, flu vaccines have become a fixture of fall. The logic of that timeline seems solid enough. A shot in the autumn preps the body for each winter's circulating viral strains. But years into researching flu immunity, experts have yet to reach a consensus on the optimal time to receive the vaccine—or even the number of injections that should be doled out. Each year, a new flu shot recipe debuts in the U.S. sometime around July or August, and according to the CDC the best time for most people to show up for an injection is about now: preferably no sooner than September, ideally no later than the end of October. Many health-care systems require their employees to get the shot in this time frame as well. But those who opt to follow the CDC curre...