Hong Kong residents started to be tested en masse for the coronavirus as the government launched its universal screening programme on Tuesday morning, despite calls from activists and some health workers for a boycott.The effort began at 8am sharp, with workers taking samples from the public at 141 collection centres across all 18 districts.Small queues, including at two centres in Hung Hom and Sha Tin, were seen before the programme’s official starting time, according to the Post’s…