A one-year-old boy remains in a critical condition in a Hong Kong hospital after contracting Covid-19, the second infant confirmed as severely infected with the contagious disease within a week, according to health authorities. The Centre for Health Protection at the Department of Health said on Friday that both boys had good past health but had not been inoculated against Covid-19. The centre urged unvaccinated high-risk groups to get vaccinated, warning that the overall Covid-19 activity could