not all indigenous people are the stereotype pushed by media
It is the fact, i am hearing about these group for the first time but the issue is that if they lack the knowledge about how to safe guard them.
you would be surprised.
they know not to touch random things due to natural learning of not touching poison bushes eating poison food and animals. they know when someone is sick to separate them from the rest of the tribe.
its actually modern medicine here that makes people in developed countries have the false sense of immortality where they think if they get sick there will always be a hospital, a bed and all the meds they can ever ask for. thus they take risks/not care as much.
if you want to know which brazilian community are most at risk. its not the indigenous people. but instead the poor that live in the slum towns/shanty downs/favela's