HongKong's sample pool is too small
Sounds like a copium reason. It's been similarly observed in other countries. All studies have biases?
It's well known now people with ill heath, older people are pushed to Sinovac even in SG etc. And even then the difference in outcome is only in 0.*%.
Not to mention those who died from mrna b4 even having the chance to get infected.
Instead of keep trying, and failing, to understand rudimentary studies with limited info, just listen to experts who have done proper studies that inactivated vax are better at preventing serious cases.
Yeah I agree, listen to the real experts:
Singapore's Ministry of Health
In SG you need to take an additional dose of Sinovac to be considered vaccinated. As seen in my previous post on the HK study for the 80+ age group, 3 dose Sinovac's effectiveness is closer to (but still higher than) 2 dose Pfizer, and 4 dose Sinovac's effectiveness is closer to (but still higher than) 3 dose Pfizer.