The trend of Hong Kong confirmed cases after starting COVID-19 vaccination plan

Document Type : Letter to the Editor


1 Department of Science, School of Science and Technology, Hong Kong Metropolitan University, Ho Man Tin, Kowloon, Hong Kong

2 School of Nursing, Tung Wah College, Ho Man Tin, Kowloon, Hong Kong

3 Key Laboratory of Molecular Target and Clinical Pharmacology, State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences and Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, China


The COVID-19 vaccination plan was officially launched on February 26 and implemented five months already. 480,000 people were completely vaccinated and around one-third population (280,000 people) were receiving the first dosage of vaccination. Is there any effect to fight against the COVID-19 pandemic vaccination plan?
According to the Centre for Health Protection data, there are 1506 confirmed cases from 1/2/2021 to 18/7/2021 including 658 males and 848 females. It has 1427 Hong Kong and 79 Non-Hong Kong residents. They are classified as 255 local cases (Hong Kong), 598 epidemiologically linked with local cases (Hong Kong), 636 Imported cases (Other countries), and 11 Epidemiologically linked with imported cases (Other countries).
Based on the above information, the number of confirmed cases decrease sharply within February to June, it is nearly ten times. From February to March, the major confirmed cases are local and epidemiologically linked with local cases. However, local and epidemiologically linked with local cases drop down between February to April. The imported cases become the major source of confirmed cases and only observe a few local cases. Female confirmed cases are much higher than the male. (To be continued)...


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