Yellow Fever Vaccination
The vaccination comprises a single subcutaneous injection administered from the age of 9 months onwards. The vaccine confers at least 10 years of immunity in nearly 100% of recipients.
Yellow fever vaccination certificate is an international vaccine certificate required for entry into countries. Travellers should remember that the certificate is valid only 10 days after the primary injection and the first dose of vaccine takes 10 days to provide good protection therefore adequate time should be allowed for vaccination before departure.
Yellow fever occurs only in tropical areas of Africa and Latin America. The World Health Organization (WHO) recommends immunisation for all travellers aged 9 months and above, travelling to and from at-risk areas, unless they are contraindicated for vaccination.
A list of countries with risk of yellow fever transmission and countries requiring yellow fever vaccination can be found on WHO website at http://www.who.int/ith/2016-ith-annex1.pdf?ua=1.
Side effects of the vaccine are generally mild. Only 5-10% of recipients will experience headache, muscle ache, low-grade fever as well as redness and swelling at the injection site. Immediate hypersensitive reactions such as urticaria or anaphylactic shock are extremely rare.
Travellers with the following health conditions may not be suitable to receive yellow fever vaccination. Before receiving the vaccine, travellers should consult doctor’s advice:
- Having a febrile illness
- Persons who are allergic to eggs or to any of the vaccine components
- Pregnant and breastfeeding women
- Infants under 9 months old
- Persons aged 60 years and older
- Persons on immunosuppressive treatment or having radiotherapy
- Persons with immunosuppressive diseases such as lymphoma, thymoma, leukaemia, Hodgkin's disease, hypogammaglobulinaemia and HIV infection
- Received other live attenuated viral vaccines within the past 4 weeks