Did you have to get a new smallpox vaccine every year?
This isn’t a vaccine, it’s similar to the flu shot, which isn’t termed a vaccine.
3-5-years. Every subsequent small pox vaccine provides even longer protection.
But, even with the efficacy window of 3-5-yaers, the small pox vaccination rollout was so overwhelming, that the disease was, as I said, effectively eradicated in the late 1970s/early 1980s.
I’m not sure if any vaccine is effective in perpetuity. Many are not. We have a tetanus vaccine. That vaccine has to be re-administered every 10-years. That’s just the nature of our immune systems
Yes, the annual flu shot is a vaccine.
Where do people get some of this simply insane information?
:: This isn’t a vaccine, it’s similar to the flu shot, which isn’t termed a vaccine. ::
It is NOW, according to the recently re-written (like, in the last 30 days) definition of “vaccine” in the available medical dictionaries.