Finally got it to translate. Yes, there are small studies that contradict each other and need some serious review. There are usually two effectiveness ratings. First is catching it while vaxxed and having mild symptoms and the second is hospital and ICU - effectiveness at keeping you out. Sinovac is <50% at you catching it with delta, maybe much lower, but it seems to be more effective at keeping you out of the hospital and ICU. I read pop articles like this, but look for good ones from med journals that are summarized, because half of it is meaningless to me. This article doesn't really tell you anything that we didn't know weeks ago, and it states it poorly. The big question is what is its effectiveness at keeping you out of the hospital and ICU. Since no Western countries are using it, it isn't appearing where I look except for the large 10.2 million meta study that doesn't included Delta. It had good effectiveness there though. The Thai studies contradict each other and are small, and it isn't clear if they are peer reviewed. NEJM https://www.nejm.org/doi/full/10.1056/NEJMoa2107715 Results The study was conducted from February 2 through May 1, 2021, and the cohort included approximately 10.2 million persons. Among persons who were fully immunized, the adjusted vaccine effectiveness was 65.9% (95% confidence interval [CI], 65.2 to 66.6) for the prevention of Covid-19 and 87.5% (95% CI, 86.7 to 88.2) for the prevention of hospitalization, 90.3% (95% CI, 89.1 to 91.4) for the prevention of ICU admission, and 86.3% (95% CI, 84.5 to 87.9) for the prevention of Covid-19–related death.