“I was sick with the flu” is a refrain heard each winter. But many who say it are actually mistaken. The flu is caused by an influenza virus, which is confirmed by specific testing. So if you weren't specifically tested for it and deemed positive, then it's possible you didn't have it.
universal flu shot
The seasonal nature of the flu shot, as well as misinformation about its perceived toxins, have damaged the vaccine's public image and contributed to its perceived ineffectiveness. But as researchers attempt to come up with a long-lasting universal flu vaccine, a new study may have an answer as to why we are failing to develop it.