According to the Brazilian Policy of Ministry of External Relations, "Brazil adopts a policy of reciprocity regarding visas. This means that nationals of countries that require visas for Brazilian citizens will need a visa to travel to Brazil. According to the Brazilian law, Brazil needs to sign an agreement, on a reciprocal basis, to offer visa waiver to national of another country. Brazil has signed visa exemption agreements with more than 90 countries."
To find out if you need a visa to travel to Brazil, click here.
Note that if you do require a visa, a Tourist Visa is the appropriate visa type that you should apply for when attending conferences (as per Brazilian Consulate instructions).
In case you need to apply for a visa to travel to Brazil, you should contact the Brazilian Representations abroad to obtain more information about the subject. Click here to access the full list of the Brazilian Consular Network or here for contact information of the Immigration Division (DIM), they are responsible for coordinating the issuance of Brazilian visas abroad.
Click here to apply for a Brazilian visa.
Visa requirements change frequently, and the information is provided without any guarantee. Before planning your trip, please contact or check the website of the Brazilian embassy or consulate in your country for the latest information.