Pros vs cons of taking natural immunity into account:
Pros:
- An extremely small number of people who would get side effects now wouldn’t
Cons:
- Logistics: you now need to perform a blood test on every single person in the country, process the results, send out vaccine invites based on the results, and set up some system where people can prove their blood test results. None of the aforementioned components currently exist. You also need to come up with some arbitrary threshold for “enough” antibodies.
- Cost: the blood test costs 4x as much as the vaccine, from what I see in other comments
- Incentives: you risk incentivising vaccine skeptics to deliberately contract COVID
Pros:
- An extremely small number of people who would get side effects now wouldn’t
Cons:
- Logistics: you now need to perform a blood test on every single person in the country, process the results, send out vaccine invites based on the results, and set up some system where people can prove their blood test results. None of the aforementioned components currently exist. You also need to come up with some arbitrary threshold for “enough” antibodies.
- Cost: the blood test costs 4x as much as the vaccine, from what I see in other comments
- Incentives: you risk incentivising vaccine skeptics to deliberately contract COVID