When Ms Siti Hawa Mohd Najib's two-month-old daughter started projectile vomiting — "like the Merlion", as she put it — she panicked. "I told my husband, this is not normal," the 40-year-old bank teller told The Sunday Times. As it turned out, her baby girl, Aaisyah Humaira, tested positive for Covid-19 the next day — Sept 24. Ms Hawa's second...