This is one of the most misunderstood points about visiting Brazil, and getting it wrong costs travellers either money or peace of mind. Two separate questions get mixed up: whether Brazil demands the vaccine, and whether you should have it.
Brazil does not require it to let you in
The Brazilian health authorities are explicit: there is no obligation to show proof of vaccination to enter the country. No certificate is checked at immigration for arrival in Brazil.
Where the certificate does matter is the other direction — some countries require the International Certificate of Vaccination or Prophylaxis (CIVP) from travellers arriving from Brazil. If Brazil is one stop on a longer trip, check the rules of your next destination.
When the vaccine is recommended anyway
Not being required is not the same as not being advisable. Brazilian health authorities recommend the vaccine for people travelling to areas with a vaccination recommendation — regions where the virus circulates. Much of the coastline and the large cities are not in that group, but forested and rural areas in several states are.
If your trip includes those areas, the recommendation applies to you the same way it applies to residents.
The detail that catches people out: ten days
Protective antibodies appear between the seventh and tenth day after the injection. That is why the vaccine has to be given at least 10 days before travel to count as protection.
Getting vaccinated the day before you fly does not protect you for that trip, and does not satisfy a certificate requirement either.
One dose, for life
A single dose gives lifelong protection. Boosters are not needed, and the international certificate is now valid for life as well. The vaccine is recommended from nine months of age.
Frequently asked questions about yellow fever and Brazil
Do I need a yellow fever certificate to enter Brazil?
No. Brazil does not require proof of vaccination at the border.
Then why do people say it is mandatory?
Because some other countries require it from travellers coming from Brazil. The requirement belongs to those countries, not to Brazil.
How long before my trip should I get vaccinated?
At least ten days. Protection develops between the seventh and tenth day.
Do I need a booster if I was vaccinated years ago?
No. One dose is considered protective for life.
General information, not individual medical advice — whether the vaccine is right for you depends on your health and your itinerary. Reviewed by Dr. Marcelo Rafael Lujan, CRM-SC 42.900. Source: Ministério da Saúde and Anvisa.
Unsure whether your itinerary calls for it? Ask a Brazilian-licensed doctor online, in English, before or during your trip.