China calls WHO chief 'irresponsible' for saying zero-COVID strategy 'not sustainable'

China hit back on Wednesday against what it called 'irresponsible' comments by the head of the World Health Organization, who described the country's uncompromising and increasingly painful 'zero COVID' policy as 'not sustainable.' The policy has placed hundreds of millions of people across dozens of cities under various degrees of movement restrictions, most dramatically in Shanghai, causing significant economic damage in China and beyond and fuelling wide-spread frustration.