The second wave of people, who emerged sometime in the last few weeks, is reportedly in good health. They have been residing at the Xinane monitoring post operated by FUNAI, Brazil's indigenous affairs department, in Brazil's Acre state, Survival International officials said.
"It is crucial that the Indians who have made contact receive top-quality health care and monitoring there at the FUNAI base, as they have very little immunity to diseases, which could wipe them out," Sarah Shenker, Survival International's Brazil campaigner, told Live Science by email. "Uncontacted tribes are the most vulnerable peoples on the planet."
Last month, FUNAI released a video clip showing the tribe's initial, voluntary contact with the Ashaninka people in the village of Simpatia. The tribe members, who speak a Panoan language, said through an interpreter that they had been attacked by gun-wielding non-Indians who killed many of the older people in their group, according to Survival International. In another sign of their interactions with outsiders, these tribe members were also carrying a gun, some screws and other items that they may have purloined from a logging camp, a Survival International official told Live Science last month.