Hong Kong Flu Cases Rise as Vaccines Expire, Expert Warns June 06

Flu cases are rising in Hong Kong, particularly among children and the elderly, as vaccine protection weakens over time. A 17-year-old unvaccinated boy is in critical condition with severe pneumonia and shock from influenza B. Professor Ivan Hung, head of infectious diseases at the University of Hong Kong, urged the public to get vaccinated before current supplies expire at the end of June.

Flu A and B Cases Climb in Hospitals

Queen Mary Hospital has logged more flu infections among children and the elderly in recent weeks. Both influenza A (subtype H3) and influenza B cases are rising. The hospital recently treated a 17-year-old with severe flu B infection who developed pneumonia and shock. The teenager had not been vaccinated against the flu.

Vaccine Protection Fades After Six Months

Immunity from the seasonal flu vaccination scheme has begun to decline after about six months, according to Professor Hung. As infection cases decreased over the past few months, antibody levels in vaccinated individuals also dropped. This weakened community immunity is driving the current rise in flu cases. Experts recommend vaccination before end of June when current supplies expire.

High-Risk Groups Face Greatest Danger

The elderly and people with chronic diseases face the highest risk from severe flu complications. Professor Hung urged these groups to wear masks in crowded places and use hand sanitisers. He said it is unclear whether the current rise represents a new peak or part of a seasonal trend. The public will need to wait a few more weeks to see how the outbreak develops.

COVID-19 Remains Mild in Hong Kong

Professor Hung said coronavirus has become endemic in the city and poses little threat. The latest variant, NB.1.8.1, is closely related to the vaccine candidate LP.8.1. Hong Kong has seen very few severe COVID cases in the past year and no major surge in infections. Overall cases remain mild even among vulnerable populations.

Final Thoughts

Hong Kong faces a rising flu threat as vaccine immunity wanes and supplies expire by month-end. Unvaccinated people and those with chronic illnesses face the highest risk of severe illness.

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