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Zhang Yongzhen stages protest, as government attempts to avoid scrutiny over handling of outbreakThe first scientist to publish a sequence of the Covid-19 virus in China was staging a sit-in protest after authorities locked him out of his laboratory.Zhang Yongzhen, a virologist, wrote in an online post on Monday that he and his team were suddenly notified they were being evicted from their lab,...

Tens of thousands of dengue cases recorded this year as high temperatures and rainy weather create ‘perfect formula’ for bugsIn his 20 years cleaning the Buenos Aires subway, Mauricio Ríos, 52, had never seen anything like it: a vast and noisy swarm of mosquitoes churning in dark clouds the length of the platform at Piedras station.Ríos pulled out his phone and filmed the growing...