"For a vaccine with 100% efficacy that gives life-long protection, the level of herd immunity as a proportion of the population, pc, required to block transmission is [1 – 1 / R0], where R0 is the basic reproduction number.16 Given an R0 value before lockdowns in most countries of between 2·5 to 3·5, we estimate the herd immunity required is about 60–72%. If the proportional vaccine efficacy, ε, is considered, the simple expression for pc becomes [1 – 1 / R0] / ε. If we assume ε is 0·8 (80%), then the herd immunity required becomes 75–90% for the defined range of R0 values."
Still, it's better than nothing even without achieving herd immunity.
The immuno-compromised probably can't take it. So if you've got HIV or auto-immune disorders that make you take immuno-suppressant drugs or have cancer and your immune system gets fucked by chemo. I don't know about pregnant women and the Covid vaccines - but they also can't take certain vaccinations. This makes up something like 5-15% of the population.
This means that everyone healthy should get vaccinated. Because the immuno-compromised need everyone else of us to get herd immunity. If you're healthy - don't be a free rider and do your part for humanity as a whole.
does everyone have to get it? if not this doesn't seem that bad.
"For a vaccine with 100% efficacy that gives life-long protection, the level of herd immunity as a proportion of the population, pc, required to block transmission is [1 – 1 / R0], where R0 is the basic reproduction number.16 Given an R0 value before lockdowns in most countries of between 2·5 to 3·5, we estimate the herd immunity required is about 60–72%. If the proportional vaccine efficacy, ε, is considered, the simple expression for pc becomes [1 – 1 / R0] / ε. If we assume ε is 0·8 (80%), then the herd immunity required becomes 75–90% for the defined range of R0 values."
Still, it's better than nothing even without achieving herd immunity.
The immuno-compromised probably can't take it. So if you've got HIV or auto-immune disorders that make you take immuno-suppressant drugs or have cancer and your immune system gets fucked by chemo. I don't know about pregnant women and the Covid vaccines - but they also can't take certain vaccinations. This makes up something like 5-15% of the population.
This means that everyone healthy should get vaccinated. Because the immuno-compromised need everyone else of us to get herd immunity. If you're healthy - don't be a free rider and do your part for humanity as a whole.
Idk what the exact percentage is for covid but with most diseases, around 95% of the population needs to be vaccinated for herd immunity to happen