Undetermined how frequent or how long the vaccine has to be taken, but we do get an influenza vaccine annually.
Do you understand that unlike the mRNA shit, the immunity from the flu shot is actually permanent?
Those of you who are stupid enough to let them inject this dangerous mRNA shit into you keep getting
“boosters” because the protective effect of the mRNA shit fades.
The reason we have to keep getting flu shots is that the flu viruses mutate enough that in a year, there will be strains that are different enough than those that the previous year's shot was engineered against, to be immune to the previous year's shot.
If you last got a flu shot in 1990, and were now exposed to the same flu virus from 1990 that went into that vaccine, your 1990 vaccination would protect you against it today.
We only need new flu shots because of how the virus mutates into new strains. Your 1990 flu shot won't protect you from a 2023 flu virus that is a different strain than existed in 1990.
The mRNA shit, unlike a genuine vaccine, won't do shit to prevent you from being infected, nor from spreading it.
But if you last got an mRNA shot in 2021, and were shortly thereafter exposed to the version of COVID-19
84 against which that shot was engineered, it would likely reduce the severity of the resulting illness. But if, two years later, you were exposed to that exact same virus, the mRNA shot you received back then would not do shit against the same infection now.