The term herd immunity, has been misused by both the right-wing, the Trump administration, and the press. They seem to believe that it means don't bother with vaccinations. Let the population acquire immunity the hard way, the slow, dangerous, and more lethal way.
I've always understood herd immunity to mean becoming immune by recovering from an earlier infection, or through vaccination.
Here's the Wikipedia link:
https://en.wikipedia.org/wiki/Herd_immunity
Herd immunity (also called herd effect, community immunity, population immunity, or social immunity) is a form of indirect protection from infectious disease that occurs when a sufficient percentage of a population has become immune to an infection, whether through vaccination or previous infections, thereby reducing the likelihood of infection for individuals who lack immunity.