HONG KONG—Guada, a mother of two young children and pregnant with twins, cries herself to sleep at night, worried that Hong Kong’s severe COVID-19 rules will separate her from her kids or force her to give birth alone. Anyone who tests positive for COVID-19 in Hong Kong, including infants and children, are put into isolation facilities with no family contact allowed, as authorities enforce their “dynamic zero” COVID policy. As coronavirus cases hit record daily highs, the government plans to roll out compulsory mass testing for the city’s 7.4 million people in March, exacerbating separation fears among many local and expatriate families. “Imagine the stress I’m having right now … scared of having to give birth alone, scared of them taking my daughters away, taking my babies away, scared that if I’m positive, they are going to take me away,” said Guada, an Argentinian who has lived in Hong Kong …