There has always been a lot of hype about getting the flu shot, especially for older folks. Unfortunately, by the time the shot becomes available, it is usually more than 2 and often more than 3 years out of date as far as that particular strain of influenza is concerned. So, just because you go the shot does not mean you will not contract the latest strain of the flu.
I got the Prevnar 13 shot to prevent Pneumococcal pneumonia. Two weeks later I was hospitalized with Pneumococcal pneumonia and damned near died. I later discovered that the vaccine was only about 75-percent effective. Wonderful!
Stay healthy, Earl,
Gary

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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)