We took this tour in Sept. No immunizations were mandatory. A couple were suggested so we got typhoid and yellow fever. Already had the hepatitis shots. Will probably need them for future tours anyway.
We are going in February and I recently got the yellow fever vaccine. Although it is not required, the CDC recommends it for travelers to Iguazu Falls. It is good forever, so I decided to get it as I may need it on another trip. My travel medicine clinic physician also recommended it. I had hepatitis A & B, plus typhoid and updated tetanus for previous trips, so I did not need those.
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