Influenza is mainly caused by four types of influenza viruses circulating in the community. It is an acute respiratory disease and is mainly spread through droplets.
In Hong Kong, influenza is generally prevalent from January to March in winter and July and August in summer.
People with weakened immunity, such as children or the elderly, may be more seriously ill. Once infected with influenza, there is a chance of complications and even death.
Parents can arrange influenza vaccination for their children as early as 6 months old to prevent from influenza infection and complications.
１ Maintain adequate indoor air circulation.
Vaccination
１ Influenza vaccination is one of the effective ways to prevent influenza and its complications
２ It is generally recommended to get the flu vaccine every autumn. Around two weeks after vaccination, the body will produce enough antibodies to fight the flu virus
３ Since influenza viruses mutate from time to time to generate new strains, WHO recommends the combination of influenza vaccines that should be used in the annual influenza season
| Vaccine Name |
Vaxigrip |
Pharmaceutical Factory |
France Sanofi |
Suitable for |
6 months old or above |
Effective prevention |
Trivalent influenza Vaccine , which contains three influenza viruses |
Inoculation time |
Over 9 years old: 1 dose |
Common side effects |
Mild side effects generally only last for 1-2 days |
Not suitable for |
People with high fever and severe physical discomfort should not be vaccinated, and can only be vaccinated after recovery |
Suitable for |
18 years of age or above |
Effective prevention |
Recombinant influenza vaccine (RIV) contains haemagglutinin (a surface protein of influenza virus) that is produced by recombinant technology, and does not require egg or influenza virus in the production process. |
Inoculation time |
18 years of age or above : 1 dose |
Common side effects |
Mild side effects generally only last for 1-2 days |
Not suitable for |
People with high fever and severe physical discomfort should not be vaccinated, and can only be vaccinated after recovery
Those with bleeding disorders or on anticoagulants should consult their doctors for advice. |
*For inquiries or appointments, please call 
3585 8533。
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