I've never gotten a flu shot and would never take any vaccine shot. Also almost never been sick. Once back in the early 90's a co-worker asked for time off for doctor visit. He had a boil on his forehead and swore it happened right after he got a flu shot and insisted it was a "microchip" stuck under the skin. Everyone including myself thought he was nuts. Now I'm not sure. He had the boil 'lanced' and demanded to take possession of the microchip which the doctor told him it was just inflammation. I wonder.