23rd October 2026 – (Hong Kong) A three-year-old boy with underlying medical conditions is fighting for his life in hospital after developing life-threatening complications from an influenza A infection, prompting health authorities to reiterate calls for the public to receive their seasonal vaccinations immediately. According to the Centre for Health Protection of the Department of Health, the young patient first developed a fever and cough on 20th October, followed by mild shortness of breath the next day when he was taken to a private clinic. His condition deteriorated rapidly on 22nd October, leading to an emergency admission at Tuen Mun Hospital where he briefly lost consciousness. Following resuscitation, he was transferred to the paediatric intensive care unit and remains in a critical condition. Laboratory testing of his respiratory specimen confirmed an influenza A (H1) infection, clinically complicated by an acute asthma exacerbation, acute necrotising encephalopathy, and septic shock.
Preliminary epidemiological investigations revealed that the toddler had travelled to the United States during the incubation period and had not received the seasonal influenza vaccine for the 2026/27 cycle. One of his household contacts recently experienced mild upper respiratory symptoms but has since recovered without requiring hospitalisation. As investigations into the case continue, the Controller of the Centre for Health Protection, Dr Edwin Tsui, noted that Hong Kong entered its current influenza season in late June and has experienced sustained high viral activity for nearly four months. Between 20th September and 17th October, the percentage of respiratory specimens testing positive for influenza ranged from 10.04 per cent to 11.61 per cent, while public hospital admission rates linked to the virus stood at 0.46 to 0.67 cases per 10,000 people—both figures significantly exceeding the baseline thresholds of 4.94 per cent and 0.27 cases respectively. Thus far, the current season has recorded 26 severe paediatric influenza cases, resulting in two fatalities, with two patients currently in a critical state, two in a serious condition, and 20 having been discharged following recovery.
Dr Tsui explained that because vaccine-induced immunity typically wanes after approximately nine months, the World Health Organization recommends annual inoculation. With the vast majority of citizens having received their previous 2025/26 jab more than nine months ago, declining overall herd immunity combined with a prolonged peak flu season has heightened the risk of severe illness among vulnerable populations. Data analysis from the previous season demonstrated that unvaccinated children were roughly five times more likely to suffer severe complications or death from influenza compared to their vaccinated peers, whilst unvaccinated residential care home elderly aged 65 or above faced a fourfold increase in severe outcomes. Consequently, all individuals aged six months and older without known medical contraindications are strongly urged to get vaccinated to minimise hospitalisation and mortality risks.
To facilitate early protection, the 2026/27 Seasonal Influenza Vaccination Programmes, including the Seasonal Influenza Vaccination School Outreach Programme, commenced on 17th September. This year’s school outreach initiative introduced a new electronic consent function via the eHealth platform, streamlining administrative procedures for both medical providers and educational institutions. Approximately 1,000 schools have already conducted outreach vaccination sessions, and the overall school programme is projected to conclude by mid-December, roughly two weeks ahead of last year’s schedule.