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. 2022 Dec;11(1):1072-1078.
doi: 10.1080/22221751.2022.2060137.

Lessons learned from the fifth wave of COVID-19 in Hong Kong in early 2022

Pak-Hin Hinson Cheung  1 , Chi-Ping Chan  1 , Dong-Yan Jin  1
Affiliations

Lessons learned from the fifth wave of COVID-19 in Hong Kong in early 2022

Pak-Hin Hinson Cheung et al. Emerg Microbes Infect. 2022 Dec.
No abstract available

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Conflict of interest statement

No potential conflict of interest was reported by the author(s).

Figures

Figure 1.
Figure 1.
COVID-19 vaccination status in Hong Kong as of 17 March 2022. (A) The percentages of people in the overall population and each age group without or with injection with the first dose only, second dose only or booster dose of COVID-19 vaccine (including both Sinovac and BioNTech) in the period of 26 February 2021 to 17 March 2022. (B) The percentages of Sinovac and BioNTech injected as first, second or booster dose in each age group and in the overall population (Original data: https://www.coronavirus.gov.hk/eng/index.html).
Figure 2.
Figure 2.
Mortality of COVID-19 during the fifth wave is reduced with vaccination. (A) The overall mortality rate (number of deaths per million as calculated by dividing the number of deaths by the number of people of the specific population) and mortality rates of all age groups in the period of 31 December 2021 to 17 March 2022 in Hong Kong. N/A: not applicable. (B) The hospitalization rate (hospitalization per million) of each age group. (C) The ICU entry rate (ICU entry per million) of each age group. (D) The overall mortality rate (number of deaths per million) and mortality rates of all age groups without or with first dose or second-booster dose of COVID-19 vaccination. Unpaired Student’s t-test was performed to judge the statistical significance of the difference between groups. Symbols (***P < 0.001; **P < 0.01; *P < 0.05; #P > 0.05.) above bars represent P values comparing the vaccinated age group with the unvaccinated counterpart of the same age. P-value comparing the same age group having first dose vaccination with second/booster dose vaccination was indicated above horizontal lines. N/A: not applicable (Original data: https://www.coronavirus.gov.hk/ eng/index.html).
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