The number of deaths related to Covid-19 has passed 500,000 in Brazil, the second-highest in the world, as experts say the outbreak could worsen amid slow vaccination and the start of winter. The virus continues to spread as President Jair Bolsonaro refuses to back measures like social distancing. The health institute Fiocruz says the situation is "critical". Only 15% of adults are fully vaccinated President Bolsonaro has been heavily criticised for not implementing a co-ordinated national response and for his scepticism toward vaccines, lockdowns and mask-wearing requirements, which he has sought to loosen. The opposition accuses the president of delaying...