A certificate proving vaccination against yellow fever is needed in case of entering various countries. The immunization against yellow fever is the only obligatory vaccination, the certificate of which can be requested upon entering and leaving certain, infected countries.  

For whom should it be considered?

• Every person older than 9 months travelling to epidemic territories
  
• Every person older than 9 months travelling to a country where vaccination against yellow fever has to be certified
  

The vaccination certificate takes effect 10 days after receiving the immunization. In case of continuous stay in a country, revaccination is needed in every 10 years.

How long is the protection period?

A 10 year-long protection period can be achieved by the vaccination against yellow fever.

When is it contraindicated?

• In case of people who are allergic to eggs, poultry, or if someone has suffered from severe allergic symptoms after receiving vaccination against yellow fever earlier
  
• Cannot be given to babies younger than 9 months (if the travel is inevitable it still can be given at the age of 6-8 months)
  
• Cannot be given to pregnant women and breastfeeding mothers
  
• In case of severe illnesses (e.g.: cancer), or if someone suffers from a disease which harms the immune system (which protects the human body against viruses and bacteria), and also when taking a medicine which hinders the normal operation of the immune system  
  
• The usage of the vaccination has to be considered to people above the age of 60