Agreed. But for the heard immunity one does not have to go and vaccinate/expose to an attenuated strain of virus the whole population. Even getting a majority o

Agreed. But for the heard immunity one does not have to go and vaccinate/expose to an attenuated strain of virus the whole population. Even getting a majority of say under 50yo immunized should have a big effect. These are special times. In reality it does not matter if this 0.1% +70yo will die after vaccination since the mortality rates in this age group infected with the wild type are bigger by about two orders of magnitude. But out of concern to human rights it will make sense not only to exclude any immunocompromised people but also make it voluntary to the groups where mortality rates are at certain level.