Covid-19 in Brazil: 'My mum was used as a guinea pig'

A Brazilian healthcare provider is accused of giving unproven drugs to Covid-19 patients and conducting experiments on elderly people without their relatives' consent. The allegations have been linked to deaths that, families say, could have been prevented. Katia Castilho's grief keeps her awake at night. In March, Norberto, her father, was admitted to a public hospital in São Paulo with Covid-19. Brazil, which has been hit hard by the pandemic, was then at the height of its second wave, with daily deaths numbering 4,000.