[quote bumbleymummy]@ollyollyoxenfree what argument do you think I’m trying to make? It was an observation that immunocompromised people will still be at risk and you, and another poster, have argued against that even though you both agree that herd immunity isn’t a guarantee. It’s a bit bizarre really. You’re repeating my point back at me to argue against it. 
There are many viruses that could be risk to immunocompromised people, and others, and we don’t vaccinate everyone against them to try to create herd immunity for those people eg, flu, meningitis, rotavirus…[/quote]
Because you seem to be missing the point?
It is difficult and requires significant intervention to generate herd immunity. It is prioritised for infectious diseases that a high risk of mortality or complications after infection - this is based on how virulent the disease is and how transmissible it is. Diseases like measles, polio, mumps, rubella are judged to be worthwhile in terms of the cost/benefit profile for population level intervention. Other infectious diseases, like influenza aren't, but we still generate a level of protection by vaccinating people who aren't themselves at significant risk (e.g., child, HCPs).
You are trying to argue that herd immunity primarily by vaccination is not necessary for coronavirus, but that is because you drastically underestimate it's impact.