Flu: Hong Kong Influenza Activity Surveillance
The Centre for Health Protection monitors influenza activity in Hong Kong each week through several sentinel systems. The headline indicator below is the influenza-like illness (ILI) consultation rate reported by sentinel private medical practitioners, used as a proxy for community influenza activity.
Private-doctor ILI consultation rate (latest week)
63.1per 1,000 consultations
- Up from 38.8 a month ago
- Up from 36.4 in the same week last year
ILI consultation rate — full history (since 2014)
Interpretation
The private-doctor ILI consultation rate has risen for 4 consecutive weeks, indicating increasing community influenza activity. The current level remains below the highest on record (88.4, September 2023).
Historical comparison
Highest on record
88.4per 1,000 consultations
Reached in September 2023
Typical seasonal peak
January
Based on data since 2014, activity is on average highest in this month (avg 39.2).
Methodology & definitions
Influenza-like illness (ILI) is defined as a fever of 38°C or above together with cough or sore throat. The consultation rate is reported weekly by a group of voluntary sentinel private medical practitioners as the number of ILI cases per 1,000 consultations, serving as an indicator of community influenza activity.
This rate is a proxy for community activity, not a count of laboratory-confirmed influenza cases; sentinel reporting covers only a subset of clinics, so figures are affected by consultation patterns and reporting coverage. The Centre for Health Protection also publishes separate surveillance streams including public general out-patient clinics, school and institutional outbreaks, hospital admissions and laboratory-confirmed detections.
Centre for Health Protection, Department of Health — Flu Express
Publicly released via data.gov.hk · data.gov.hk dataset
Update frequency: weekly
Data up to week 28 of 2026 (11/07/2026)
This page presents population-level influenza surveillance reflecting overall trends. It is not a diagnosis or personal health-risk assessment and is no substitute for professional medical advice. Read the medical disclaimer →
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