It is nowadays. Odd that I got the flu each and every year that I got the shot and got it bad but once I quit getting the shot, I quit getting the flu. That was over 25 years ago. In recent times I've taken the shot 2 times and so far so good. My last one was last Tuesday. In times past, I would be sick by now. Medical experts? Yeah right. I 'doctor' a lot of stuff too :D