Hong Kong faces about 11 new Covid-19 cases on Wednesday, and an infectious disease expert said residents should still stay at home as much as possible despite the easing of social-distancing measures.The bump in infections came a day after the city recorded zero local cases for the first time since early July, with just four imported ones taking the total number in Hong Kong to 4,975, with 102 related deaths.Dr Leung Chi-chiu issued his warning as a team of medical staff from mainland China,…