Influenza vaccination

Influenza vaccination is the most effective means in preventing influenza. This year, free 2018/2019 influenza vaccination will be extended to all local residents, including non-local students and workers who are studying or working in the territory, from 11st December 2018.

Vaccine information: The vaccine is inactivated. The 2018-2019 seasonal flu vaccine contains four influenza viruses: A/H1N1 virus, A/H3N2 virus and two types of influenza B viruses.

Recommended dose: Persons aged 9 or above require only one dose; children from 6 months to 9 years of age, who have not been vaccinated before, require two doses to be administered at least one month apart.

Vaccine side effects:

Most common side effects are mild, including low-grade fever, fatigue, muscle pain, headache or pain and redness at the site of injection. These symptoms usually last for only 1-2 days, and require no treatment. Some people who are allergic to the ingredients of the vaccine may experience severe allergic reactions.

Guillain-Barre syndrome, GBS (an acute inflammatory demyelinating polyneuropathy, AIDP) occurs mostly in middle-aged and elderly adults. There were case reports of GBS following influenza vaccination. However, there is no consistent scientific data proving an association between influenza vaccination and the development of GBS. Although several studies suggested that GBS is potentially correlated with flu vaccines, the incidence is less than 1 per million vaccines.


Individuals should not receive the vaccine if they:
-Have had allergic reactions or severe adverse reactions to previous influenza vaccines.
-Have allergic reactions to any of the ingredients of the vaccine.
-Have severe allergy to eggs or chicken(develop swelling of oral lips, urticaria, asthma/dyspnea, etc.).

The administration of vaccine should be postponed:
-If you are suffering from medium to high febrile disease.