Brazil is facing a 'biological Fukushima' and is seeing lethal new Covid variants every week that could threaten to destabilise the world, one of the country's leading health experts has warned. The country's P1 variant - believed to be 150 times more contagious than the original Covid-19 virus - is of the most concern. It can reinfect those who had the first strain, and has killed thousands of people in their 30s, 40s and 50s. The variant has infected hundreds in Canada, including players in professional ice hockey team the Vancouver Canucks, and has been recorded in 27 people in...