Hong Kong medical expert recommends annual Covid-19 and flu vaccinations for high-risk groups

Annual Covid-19 vaccination advised for high-risk groups in Hong Kong

David Hui Shu-cheong, professor of respiratory medicine at the Chinese University of Hong Kong, has urged that vulnerable groups in Hong Kong receive Covid-19 vaccinations annually. Speaking on Saturday, June 21, Hui noted that outbreaks are expected to recur every six to nine months due to declining antibody levels in the population.

“The current outbreak started in April, peaked at the end of May and is now beginning to subside,” Hui said during a radio interview. He estimated that the present wave may end by July or August.


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Hui emphasized that high-risk groups, including individuals with chronic illnesses, children, the elderly, and immunocompromised individuals, face greater risks of severe complications, such as pneumonia, respiratory failure, or even death, if infected.

Authorities have confirmed six severe pediatric Covid-19 cases so far in 2025, with no fatalities reported. Two of the children had pre-existing conditions, and four had not received Covid-19 vaccinations.

“As a new outbreak will come back every year, I would advise the high-risk groups to get jabbed at least once every year against the infections,” Hui said.

He added that because Covid-19 symptoms often resemble those of seasonal influenza, individuals showing respiratory symptoms should use rapid antigen tests immediately. Early detection allows for timely treatment, which can help prevent complications.

Flu season preparations include annual influenza vaccinations

In addition to Covid-19 vaccines, Hui recommended annual influenza vaccinations for high-risk individuals. He referenced a recent cluster of influenza A cases at a primary school in Sham Shui Po, involving 46 people, 41 male students aged 7 to 10 and five staff members.

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Of the infected, 41 sought medical care and three required hospitalization. All cases were mild. Hui attributed the cluster to poor ventilation and inadequate sanitation of shared classroom items.

“Influenza vaccines have been used for many years with extremely low side effects, mainly minor redness and swelling at the injection site,” he said. “Parents should arrange for their young children to receive the flu vaccines to reduce infection risks.”

He warned that Hong Kong’s summer flu season typically spans half the summer, usually from July to August. The vaccination rate among children aged six months to two years remains low, with only 27 per cent vaccinated.

Hui concluded by stressing the importance of immunization for reducing public health risks amid ongoing viral transmission cycles.