If most of a population is already infected and has natural immunity, those people would certainly make the efficacy of the product seem much higher. At some p

If most of a population is already infected and has natural immunity, those people would certainly make the efficacy of the product seem much higher. At some point, they'll declare the campaign a success. We'll never get to see the real data because they aren't collecting it. There's no centralized reporting or control. In the US, there has been 32M cases reported so far, and who knows how many asymptomatic cases that were never counted. Since a large portion of cases are asymptomatic, the total case count could be multiples of the confirmed case count. The clinical trials will never be replicated, it will just be 'oops, pandemic over, we assumed it all worked.'