The difference is the polio vaccines are nearly 100% effective (after 4 doses). A single dose of the polio vaccine also offers less immunity, as in the chance of developing the symptoms. The first polio vaccines were a lot less effective than the current ones. The current oral version is only 95% effective, but that was enough to stop the spread as polio virus first needs to move through the intestines thus takes longer to spread. It’s also a much, much simpler virus that does not evolve nearly as quickly as corona viruses.
For comparison: the corona vaccines are considered more effective than flu vaccines, which vary from 25% to 75% effective against symptoms depending on the year.
No it’s not.
The difference is the polio vaccines are nearly 100% effective (after 4 doses). A single dose of the polio vaccine also offers less immunity, as in the chance of developing the symptoms. The first polio vaccines were a lot less effective than the current ones. The current oral version is only 95% effective, but that was enough to stop the spread as polio virus first needs to move through the intestines thus takes longer to spread. It’s also a much, much simpler virus that does not evolve nearly as quickly as corona viruses.
For comparison: the corona vaccines are considered more effective than flu vaccines, which vary from 25% to 75% effective against symptoms depending on the year.
The covid shot does nothing to stop you from catching or spreading covid though, no matter how many boosters you get.
Flu shots are giving you last years strains, that’s why they’re relatively low in effectiveness. The flu mutates every year.
They all lower the active viral load by training your body to fight the virus. Hence, they are all vaccines.
Must be the first vaccine that doesn’t stop you catching, spreading, getting sick, or dying from what it’s vaccinating against.
Well no the first polio vaccine, to use your own example, didn’t do that either. Even today it takes 4 shot to reach 99,9
No amount of covid shots stop you catching or spreading covid.
Neither did the first polio shot
It could be 0,1% effective and it would still be called a vaccine