I want to mention something else,
I should say getting the flu shot will not prevent the flu, instead it lessens the severity of the deadlier strains of flu out there. That is the reason the flu is still very common and impossible to eradicate
Especially when the virus mutates all the time
And the flu shot won't prevent you from getting the mutated strain.
if you get the flu, please stay home, and don't spread your mutated virus and infect other vaccinated people
Unfortunately, the flu is inevitable, but that is no excuse to not get your flu shot.
Just do not expect it the highly prevent the flu like how the measles and polio vaccines do for their respected diseases
Was the vaccine available at the time?