DH urges unvaccinated people to take immediate actions as influenza activity remains elevated
The Controller of the Centre for Health Protection (CHP) of the Department of Health, Dr Edwin Tsui, today (February 14) reminded members of the public that the seasonal influenza activity in Hong Kong remains at a high level, and the influenza season will continue for some time. All sectors of the community should remain vigilant and enhance personal hygiene and protection measures against influenza. All persons aged 6 months and above (except those with known contraindications) who have not yet received the seasonal influenza vaccination (SIV) should act immediately to protect their health and that of their family members.
According to the CHP's latest surveillance data, in the week ending February 8, the percentage of respiratory specimens testing positive for seasonal influenza viruses is 10.23 per cent. The influenza admission rate in public hospitals is 0.67 cases per 10 000 population, indicating that the overall influenza activity remains at a high level.
"Hong Kong entered the influenza season in early January this year, and it is now the sixth week. The Influenza A (H1) virus is predominant this season, accounting for nearly 90 per cent of the subtyped influenza virus detections. In terms of severe or death cases caused by influenza, this season, as in the past, mainly affects the elderly and young children," Dr Tsui said.
As of February 12, the CHP recorded 301 severe or death cases among adult patients. About 70 per cent of them have not received SIV of this season, and about 70 per cent of them have chronic diseases. Among the 186 death cases, about 90 per cent of them were aged 65 or above. For children, nine cases of severe influenza-associated complications were recorded this season. Seven (including two preschool children and five school children) of them had not received SIV of this season, and two cases had chronic diseases.
"The number of severe or death cases recorded in the first five weeks of this season is higher than that of the same period last season, but similar to the 2018/19 influenza season, i.e. before the COVID-19 pandemic, which was also dominated by influenza A (H1). Based on historical data, the entire influenza season usually lasts for two to four months. Whether it will last for 28 weeks, as in the past influenza season, will depend on any change in the circulating strains of viruses, including any increase in the activities of influenza A (H3) and influenza B viruses," Dr Tsui said.
He pointed out that, according to the virus analysis conducted by the CHP, the strains of influenza viruses that are circulating in Hong Kong nowadays are similar to the strains of viruses in the seasonal influenza vaccine currently available in Hong Kong, which means that the vaccine is effective in lowering the risk of serious complications or death from the infection. Data analysis also showed that the rate of serious complications in residents of residential care homes for the elderly who did not receive SIV was 2.2 times that of vaccinated residents, highlighting the protective effect of SIV.
As of February 9, a total of about 1 975 100 doses of vaccines were administered under various vaccination programmes, an increase of about 8.4 per cent over the same period in the last SIV season and a record high, surpassing the total number of doses administered under various vaccination programmes in the year 2023/24 (i.e. about 1 873 000 doses).
The number of schools participating in the SIV School Outreach Programme has also increased significantly this year. About 1 020 kindergartens/child care centres (97 per cent), about 640 primary schools (98 per cent) and about 490 secondary schools (98 per cent) have completed or are arranging SIV school outreach activities. This is higher than the participation rate in year 2023/24, i.e. 80 per cent of kindergartens/child care centres, 95 per cent of primary schools and 70 per cent of secondary schools.
"The SIV coverage rate for children aged 6 months to under 2 years remains relatively low at about 22.5 per cent. Although slightly higher than that of the same period in the last SIV season, the coverage rate was still lower than that of other age groups of children. To enhance relevant vaccination services and boost the vaccination rate, the Government has opened the DH's Maternal and Child Health Centres (MCHCs) to all children aged 6 months to under 2 years. For the sake of the children's health, parents are advised to make appointments via the online booking system as soon as possible for children aged 6 months to under 2 years who have not yet received SIV to be vaccinated at the designated MCHCs," Dr Tsui said.
He also reminded parents not to believe in alternative therapies circulating on the Internet that claim to prevent and cure influenza in infants and young children. There is no scientific evidence to support such claims. SIV is one of the most effective ways to prevent seasonal influenza and its complications, while significantly reducing the risk of hospitalisation and death from seasonal influenza for infants and young children. Children who develop symptoms of respiratory infection, even if mild, should consult a doctor as soon as possible to avoid any delay in management.
For the more information, members of the public are welcome to visit the CHP's seasonal influenzaandCOVID-19 & Flu Expresswebpages.
Update on chikungunya fever
The Centre for Health Protection (CHP) of the Department of Health announced that, as of 5pm today (January 11), no new cases of chikungunya fever (CF) had been recorded.
Latest surveillance data
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Hong Kong has recorded a total of 82 confirmed CF cases last year. Among them, 11 were local cases, and the rest were imported cases.
Since the beginning of 2025, and as of December 10, 2025, a total of 502 264 CF cases and 186 CF-related deaths have been reported in over 40 countries/territories. Cases have been reported in the Americas, Africa, Asia, and Europe. Although the northern hemisphere has entered the winter season, temperatures in subtropical and some temperate regions remain elevated due to climate change, creating favourable conditions for mosquito breeding. In addition, CF outbreaks continue to occur in many countries worldwide. The risk of imported cases persists. Members of the public should check the situation of the destinations before travelling abroad, especially when travelling to Southeast Asian countries.
Government's comprehensive follow-up actions
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Given that some local cases of CF have visited the Tsing Yi Nature Trails or the surrounding area in November last year, the trails are currently closed until further notice. Relevant government departments continue to conduct large-scale mosquito control and prevention efforts along the trails, and the CHP appeals to the public not to enter the area in order to reduce the risk of contracting CF and to avoid exposure to chemicals or interfering with the mosquito control operations. Since the confirmation on December 10, 2025, of a case involving a person who had visited the Tsing Yi Nature Trails on November 30, 2025, no further local cases have been recorded to date. The CHP continues to urge individuals who have recently hiked along the Tsing Yi Nature Trails to seek medical attention as soon as possible if they develop relevant symptoms and to call the enquiry hotline (Tel: 2125 2373), which operates from 9am to 6pm.
The Food and Environmental Hygiene Department (FEHD) has been continuously conducting intensive fogging operations to eliminate adult mosquitoes along the Tsing Yi Nature Trails and the surrounding area. At suitable locations, large ultra-low volume foggers have been deployed, and a robot dog is being put on trial to enhance operational effectiveness. The FEHD has also set up new mosquito trapping devices, cleared discarded containers and garbage that could cause stagnant water, and applied larvicide oil or larvicides in areas with stagnant water that cannot be removed immediately. The FEHD has been collaborating with the Kwai Tsing District Office, the Lands Department and the Drainage Services Department to strengthen efforts in eliminating potential mosquito breeding sites along the Tsing Yi Nature Trails. Pamphlets have been distributed to hikers in the area, urging citizens to be vigilant against mosquito infestations and take personal protective measures. The FEHD has also held meetings of the interdepartmental task forces on anti-mosquito work across districts to discuss the latest developments regarding the situation and plan accordingly to co-ordinate relevant departments and stakeholders in strengthening mosquito prevention and control measures in areas under their purview.
Continuously strengthening prevention and control
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The FEHD and relevant departments have comprehensively enhanced the mosquito control operations in Hong Kong since July last year, and this has continued. Among these, the FEHD has conducted vector investigations and targeted mosquito control operations against the imported and local cases. In light of the local case, the FEHD has immediately conducted follow-up actions, including:
carrying out intensive fogging in scrubby areas within a 250-metre radius of the relevant locations to kill adult mosquitoes;
carrying out inspections of the locations, removing stagnant water, applying insecticides and disposing of abandoned water containers every week with a view to preventing mosquito breeding; and
enhancing public education efforts through organising health talks, setting up mobile education stations, and distributing publicity leaflets.
The abovementioned measures will be continued. Furthermore, the Government will further enhance the mosquito control efforts in addition to the existing measures.
Preventive measures to be taken by the public
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Members of the public should use DEET-containing insect repellents or other effective active ingredients properly to prevent mosquito bites, but the following precautions should be taken when using them:
read the label instructions carefully first;
apply right before entering an area with a risk of mosquito bites;
apply on exposed skin and clothing;
use DEET of up to 30 per cent for pregnant women and up to 10 per cent for children (for children who travel to countries or areas where mosquito-borne diseases are endemic or epidemic and where exposure is likely, those aged 2 months or above can use DEET-containing insect repellents with a DEET concentration of up to 30 per cent);
apply sunscreen first, then insect repellent;
reapply only when needed and follow the instructions; and
in addition to DEET, there are other insect repellents available on the market containing different active ingredients, such as IR3535 and picaridin. When using any insect repellent, the public should follow the usage instructions and precautions on the product label.
The FEHD also appeals to members of the public to continue to stay alert and work together to carry out mosquito prevention and control measures early, including inspecting their homes and surroundings to remove potential breeding grounds, changing water in vases and scrubbing their inner surfaces, removing water in saucers under potted plants at least once a week, and properly disposing of containers such as empty cans and lunch boxes. The FEHD also advises members of the public and property management agencies to keep drains free of blockage and level all defective ground surfaces to prevent the accumulation of water. They should also scrub all drains and surface sewers with an alkaline detergent at least once a week to remove any mosquito eggs.
The public should call 1823 in case of mosquito problems, and may visit the following pages for more information: the CF page of theCHPand theTravel Health Service, the latestTravel Health News,tips for using insect repellents, and the CHPFacebook Page,Instagram AccountandYouTube Channel, and also theMosquito Prevention and Control dedicated pageof the FEHD.
Source: AI-found images
