Wan EYF, Mok AHY, Yan VKC, Ying Chan CI, et al. Effectiveness of BNT162b2 and CoronaVac vaccinations against SARS-CoV-2 omicron infection in people aged 60 years or above: a case-control study. J Travel Med 2022 Oct 17. pii: 6761907. doi: 10.1093.
PMID: 36250571