The grim news came a day after the Indigenous community of Parque das Tribos, outside the northern city of Manaus, held a funeral for its chief, Messias Kokama, who died of COVID-19.
Kokama, who was 53, was buried in a closed casket wrapped in plastic to avoid spreading the virus.
Brazil, the Latin American country hit hardest in the pandemic, has seen its death toll spiral.
It has registered nearly 15,000 deaths and 220,000 cases so far, though experts say under-testing means the real figures could be 15 times higher or more.
The pandemic is also creating an opening for illegal miners and loggers to encroach on Indigenous lands, said rights group Survival International.
"Countless tribal lands are being invaded, with the backing of a government which wants to completely destroy the country's first peoples and makes no attempt to hide it," said the group.
It criticised far-right President Jair Bolsonaro for his push to open protected Indigenous lands to farming and mining.
People in Australia must stay at least 1.5 metres away from others. Check your state’s restrictions on gathering limits.
Testing for coronavirus is now widely available across Australia. If you are experiencing cold or flu symptoms, arrange a test by calling your doctor or contact the Coronavirus Health Information Hotline on 1800 020 080.
The federal government's coronavirus tracing app COVIDSafe is available for download from your phone's app store.
SBS is committed to informing Australia’s diverse communities about the latest COVID-19 developments. News and information is available in 63 languages at sbs.com.au/coronavirus.