A Hong Kong minister who attended a concert at the centre of a Covid-19 scare has tested negative for the coronavirus, as the city expects to report another 12 infections on Thursday.Secretary for Home Affairs Caspar Tsui Ying-wai was in the audience along with city leader Carrie Lam Cheng Yuet-ngor for last Friday’s performance by the Hong Kong Philharmonic Orchestra, members of which were quarantined after bass clarinettist Lorenzo Antonio Iosco returned a positive coronavirus reading…