International Certificate of Vaccination for yellow fever is demanded by Brazilian Government for travelers who have been on last three months or come from these countries:
• Burkina Faso
• French Guyana
• Democratic Republic of the Congo
• Sierra Leone
So, you should get your certificate at an official yellow fever vaccination center as designed by respective state health departments in your city and/or your country that administers yellow fever vaccines manufactured under approval by World Health Organization.
Furthermore, we recommend this vaccination for all Brazilians, foreigners or tourists who intend to visit these Brazilian states:
Mato Grosso do Sul
P.S. The vaccination must be taken (10) ten days before travelling, at least.
Note that these information are always changing. Please check before traveling.