In Hong Kong, flu season peaks twice a year: during the winter months (January to March) and the summer months (July to August). While some may think the flu is just a bad cold, it can actually lead to serious complications and, in severe cases, even death. Especially if you're planning to travel in the future, getting a flu shot is one of the best ways to protect yourself from the virus. Here’s everything you need to know about getting a flu shot in Hong Kong.
Flu vs Cold Symptoms
Influenza, or the flu, is an acute respiratory infection caused by the influenza virus. Unlike a common cold, the flu can spread to the lungs and lead to complications such as pneumonia, bronchitis, myocarditis, worsening asthma, or even encephalitis. Symptoms are also more severe than those of a cold, and in some cases, hospitalization or death may occur.
In Hong Kong, the most common types of flu are Influenza A and B. Both share similar symptoms, including sore throat, fever, cough, and muscle or joint pain. However, Influenza A tends to be more severe and is more likely to cause complications, while Influenza B is generally milder.
What Are the Side Effects of the Flu Shot?
Like other vaccines, the flu shot may cause mild side effects within 6 to 12 hours after receiving your shot. These can include fever, muscle pain, redness or swelling at the injection site, headache, and fatigue. These symptoms are usually mild and go away on their own within 1 to 2 days. However, if symptoms persist or if you experience rare or severe side effects (such as a severe allergic reaction), seek medical attention immediately. According to the Department of Health, common side effects of the flu vaccine include:
- Pain, redness, or hardening at the injection site
- Muscle pain and fatigue
- Fever, headache, chills, joint pain, nausea, or diarrhea
- Itching at the injection site (uncommon)
- Dizziness (uncommon)
- Severe allergic reactions, such as anaphylaxis (rare; seek medical help immediately)
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Trivalent vs Quadrivalent vaccines: what’s the difference?
Flu vaccines in Hong Kong come in two main types: inactivated flu vaccines (given via injection) and live-attenuated flu vaccines (administered as a nasal spray). Both are effective, but they work slightly differently.
Currently, injectable flu vaccines in Hong Kong are available in two forms: trivalent and quadrivalent. Trivalent vaccines protect against the most common flu strains, while quadrivalent vaccines offer additional protection against Influenza B. The nasal spray vaccine, on the other hand, is only available as a quadrivalent option.
How Much Does the Flu Shot Cost?
Eligible individuals, such as seniors and high-risk groups (details below), can get a free flu shot through the government's vaccination program. For those not covered by the program, flu vaccines are available at private clinics for a fee. You can visit the clinic or hospital's vaccination webpage or call/WhatsApp to make an appointment.
Hospital/ clinic | Price (injection) |
HK$320 | |
HK$500 | |
HK$268 | |
HK$480 | |
HK$260 | |
HK$255 | |
HK$268 | |
HK$300 | |
HK$420 |
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9 Groups Eligible for Free Flu Vaccinations
The government launches an annual flu vaccination program, and the 2024/25 seasonal flu vaccination program began on September 26, 2024. Free or subsidized flu shots are available for eligible individuals. The following nine groups qualify:
- People aged 50 or above
- Children and adolescents aged 6 months to under 18 years
- Pregnant women (who are current patients or service users of government hospitals)
- Residents of elderly care homes (excluding day center users)
- Residents of disability care homes
- Individuals aged 18 to 49 with intellectual disabilities, physical disabilities, or long-term illnesses receiving CSSA (Comprehensive Social Security Assistance)
- Healthcare workers (employed by the Hospital Authority, Department of Health, nursing homes, residential childcare centers, or designated intellectual disability service providers)
- Poultry workers
- Individuals working in pig farming or pork slaughtering
These high-risk groups, specific occupations, and individuals with chronic illnesses can benefit from the "Government Vaccination Program." They can receive free flu shots at private clinics registered under the "Vaccine Subsidy Scheme," vaccination sites under the Hospital Authority, or related institutions.
Disclaimer: The information provided above is for reference only and does not constitute any form of disease prevention/treatment recommendation, endorsement of medical institutions, or substitute for professional medical advice, diagnosis, or treatment. If you have any medical or health-related concerns, please consult a qualified healthcare professional.
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