This winter flu season, some 111 people have died since January, including two people aged under 18, according to figures from the Centre for Health Protection.
Health experts have warned the epidemic may not have reached its peak. Authorities are seeking to reduce contact between students in crowded environments ahead of the Lunar New Year holiday, which is expected to start next week.
No shortage of influenza medicine at Polyclinic pharmacy
"If we don't deal with this now, our concern is that even if the epidemic begins to wind down there may be more deaths or severe cases with children," microbiologist Yuen Kwok-yung told reporters on Wednesday.
Public hospitals and emergency wards in the city have been overflowing with patients while struggling with staff shortages, local media reported.
Hong Kong is particularly alert to the spread of viruses.
Bird flu was first reported in humans in Hong Kong in 1997, when six people died, and subsequent outbreaks have killed hundreds more worldwide.
An outbreak of Severe Acute Respiratory Syndrome (SARS) swept through the city in 2003, killing 299 people.
COMMENTS
Comments are moderated and generally will be posted if they are on-topic and not abusive.
For more information, please see our Comments FAQ