So, so, sad.
The model suffered from necrosis, or the fast deadening of tissue, caused by septicemia.
Septicemia, triggered by a bacterial infection, causes insufficient blood flow that can lead to organ failure.
"Unfortunately Mari couldn't resist any longer. She passed away at 3 a.m. today," said Henrique Fontes, executive director of Miss World Brazil, to the media via e-mail.
Our thoughts are with Miz da Costa's family and friends.
Also, some scary figures — septicemia is the 10th leading cause of death in the U.S., and unfortunately, doctors don't know too much about the ailment.
It kills approximately 800,000 in the US a year.
Please figure it out, docs! Keep us safe!