Most of the sheep who line up for that every year are completely unaware that it's only "protecting" against four strains, and they're all from last year, since it takes 9 mos. to produce the vaccine. This year's strains are all mutated new ones. So all you're doing is inoculating against last year's germs and weakening the immune system, plus giving yourself a low-to-medium-grade case of the flu for no reason.
Also, the makers of the flu vaccines only claim it's effective about 40% of the time. Yet the sheep line up to baa for it.
The vaccine must be changed each year, in hopes of matching the ever-mutating viruses. And that’s been a challenge. On average, it’s been 40% effective, meaning it’s prevented illness 40% of the time.
Most of the sheep who line up for that every year are completely unaware that it's only "protecting" against four strains, and they're all from last year, since it takes 9 mos. to produce the vaccine. This year's strains are all mutated new ones. So all you're doing is inoculating against last year's germs and weakening the immune system, plus giving yourself a low-to-medium-grade case of the flu for no reason.
Also, the makers of the flu vaccines only claim it's effective about 40% of the time. Yet the sheep line up to baa for it.
Source: https://www.webmd.com/lung/news/20200902/how-effective-is-the-flu-vaccine