Can you point me to a 2 year developed and approved vaccine?
Shingrix, the newest shingles vax took well over 10 ten years to develop and obtain FDA approval (2017). Shingrix is a sub-unit vax using relatively new tech. It replaced/superceded a whole virus shingles vax.
An ARR of 0.4% to 0.7% requires a very small chance of contracting the disease - yet a third or a half of the population has.
If the vaccine would prevent 95% of those cases, then ARR would be closer to a third or a half.
That ARR number from the trials was from a short snapshot timeframe, when cases numbers were lower than this Winter’s wave. Resistance to the disease persists longer than the trial period, and continues to reduce risk.
If the virus eventually works its way through the whole unvaccinated population, ARR should approach RRR.
Off hand.....Measles.
Not 2 years but not 10 either.
1954 the Measles virus was found and isolated.
1960 the first test vaccine.
1961 the discovery of using chicken eggs or grow the virus.
1963 vaccine being delivered.
Polio was pretty fast too. But I’d have to look that up.
Who made the “official” vaccine approval timeline? The Government.
Who over-rides the vaccine approval timeline? The Government.
I think it depends how devastating any given virus is at the time of history.
Regarding speed at which trails and approval get done.
Measles was spreading like crazy.
Polio was a dreadful disease and gripping the country.
People against the Covid vaccine say the don’t trust the government. But rely on the Government’s own set timeline for vaccine approval.
Except for the Covid vaccine of course.
Perhaps it’s me.......I’m more black and white. I either trust the government or I don’t. Picking and choosing parts that sound good to me seems hypocritical.
Have a great day.