Originally Posted by Chris

Because the virus would still be moving freely through the un-vaccinated half of the population. The risk of vaccine-escape mutations is higher, the more the virus reproduces. And even if the vaccine is 75% effective in vulnerable groups, 25% of that group is still vulnerable. Allowing the virus to move freely through the unvaccinated population puts vulnerable people for whom the vaccine has been ineffective, at unnecessary risk.

You see no reasons now, because you’ve barely acknowledged any reasons since day one, as your tedious forum status line has stated for months now, to the enlightenment of precisely no-one.