It took only 10 days from start to finish, from the time 28-year-old Graciane da Silva got sick to the time she died.

She was alone when she passed away in a Rio de Janeiro Hospital -- her mom, Maria da Penha da Silva Siqueira, thinks about that often.

"It never crossed our mind that it would happen to her," said da Silva Siqueira. "It was too fast. This virus does not let us say goodbye."