Quote:
Originally Posted by Pierre
which would suggest you can employ shielding of at risk groups as opposed to the blunt instrument of lockdown of all groups
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All groups? So who operates all the essential services?
The shielding group would still be at risk from uncontrolled contact with those supplying those essential services. For some sections of the shielding group, not even a vaccine is a viable solution. The only viable solution is for everybody else to gain "herd immunity", either with or without a vaccine.