With temperatures checked, masks fitted, and hand sanitizers at the ready, many Singapore children returned to school on Tuesday after a novel coronavirus lockdown of nearly two months. With one of the highest coronavirus tallies in Asia, Singapore has said it will ease restrictions gradually, with the registry of marriages and some businesses, including pet salons, also reopening on Tuesday. Studies in some European countries have shown reopening schools has not led to a rise in coronavirus infections, while other studies have shown fewer cases of the disease among children compared with adults.