Herd immunity is tied to the specific variant. A more infectious variant, or a variant with a less effective vaccination, leads to need for a higher vaccination rate.
We are now seeing that play out, with infections growing again in Israel. What’s notable, 1/3rd of the new infections are even in fully vaccinated individuals. That‘s not to say vaccinations dont work — Infection rates would assuredly be MUCH higher without vaccinations.
And further, much of the infection spread is from unvaccinated people — If everyone was vaccinated, still might reach herd immunity.
But it‘s fair to say, as of now, Israel does not have herd immunity as to the Delta variant.
And low vaccination communities in the US are truly at risk for Delta:
We are now seeing that play out, with infections growing again in Israel. What’s notable, 1/3rd of the new infections are even in fully vaccinated individuals. That‘s not to say vaccinations dont work — Infection rates would assuredly be MUCH higher without vaccinations.
And further, much of the infection spread is from unvaccinated people — If everyone was vaccinated, still might reach herd immunity.
But it‘s fair to say, as of now, Israel does not have herd immunity as to the Delta variant.
And low vaccination communities in the US are truly at risk for Delta: