> then presumably the Chinese know more about its (long term) effects than the rest of us Not necessarily true. The lab in question has been known to house cor

> then presumably the Chinese know more about its (long term) effects than the rest of us Not necessarily true. The lab in question has been known to house coronavirus variants and done bat research. SARS-cov-2 isn't the first coronavirus out of China, remember SARS-cov-1. This is not in dispute. What was in dispute is if it leaked from there or not, or spread naturally outside human error. The proximity of the lab to the first cases, the measures taken there before the known spread of the virus and their attempt to destroy information about it is what leads to speculation. We may never know what actually happened outside anecdotal information without more information from China. Given the low likelihood of it being human engineered though, we should probably still be able to trace how it evolved in nature before spreading to humans. I don't see the correlation between this and the zero-COVID policy. Labs (ethically) work with pathogens all the time, they obviously don't inject viruses into humans without substantial cause.