We know how herd immunity comes about. It's the goal of medical science.
But in this case of COVID, the anti-vaxxer have been *misusing* herd immunity as a way to get us all to stop using masks or getting vaccinated.
We want herd immunity. I want herd immunity. But in the face of a contagious disease which just got a whole lot more contagious, then herd immunity is going to be harder to get.
Just like with bubonic plague, and small pox, and measles, and polio... unless there is significantly more vaccinations taking place and significant protocols of slowing the contagion (like the use of masks).
So, when we talk about getting people vaccinated and wearing masks and people pipe up about 'herd immunity' as a given to let our guard down... to get us letting up on mask usage or vaccine mandates, that's the talking point of anti-vaxxers.
But, when we talk about getting people vaccinated and wearing masks in order to get to 'herd immunity,' then that's science.