Are Amazonians that much at risk? Other genetically isolated groups?

‘We are on the eve of a genocide’: Brazil urged to save Amazon tribes from Covid-19

And they are using the word to refer to the killing of an entire kind of humans.

Brazil’s leaders must take immediate action to save the country’s indigenous peoples from a Covid-19 “genocide”, a global coalition of artists, celebrities, scientists and intellectuals has said.

In an open letter to the Brazilian president, Jair Bolsonaro, figures including Madonna, Oprah Winfrey, Brad Pitt, David Hockney and Paul McCartney warned the pandemic meant indigenous communities in the Amazon faced “an extreme threat to their very survival”.

“Five centuries ago, these ethnic groups were decimated by diseases brought by European colonisers … Now, with this new scourge spreading rapidly across Brazil … [they] may disappear completely since they have no means of combating Covid-19,” they wrote.

Why?

They give no reason to believe these Amazonians face a greater threat than anyone else of actually being completely wiped out.

All of us "have no means of combating Covid-19".

But then the story reports this, which suggests risk due to long-standing genetic isolation.

“In some of the villages I knew measles killed 50% of the population. If Covid does the same thing it would be a massacre,” said Carlo Zaquini​, an Italian missionary who has spent decades working with the Yanomami.

And this.

“Just in the Brazilian Amazon we have 103 indigenous groups which have never been contacted . . . ,” Salgado said.