[munk-a]

The flu shot that's available each year doesn't undergo long term trials - it actually usually goes through about nine months to a year of trials due to predictions on what the flu outbreak will look like - but even then the substance is a reconfiguration of technology with new details being integrated.

In some areas of medicine we can afford to move slowly and we absolutely should - but when it comes to the flu we don't have that luxury.

[jaywalk]

And outside of some specific professions, the yearly flu shot is entirely optional. We don't have people running around screaming that you're a murderer or that you should be excluded from society if you choose not to get it. It's a personal medical decision, and that's the end of it.