So far around 10% of us, maybe 15% tops, have had covid That includes only 10-15% of over 70s and over 80s have had it. And we've had well over 60000 deaths. Another 600+ today announced.
We could leave it to run free until it runs out of peopel to kill after maybe 250000 deaths in UK, so depends whether you think thats a vote winner. Herd immunity needs around 70% to have had it and even then it will still kill some, just a lot less
But if your wanting that your ignoring the fact that hospitals will collapse with the numbers involved.