Singapore has rejected “herd immunity” as a strategy in the fight against the coronavirus pandemic and signalled it instead will continue to contain transmission until a vaccine is ready.“It’s too big a price for us to pay,” Kenneth Mak, the health ministry’s director of medical services, said at a briefing on Tuesday. “Even though we have taken many steps to prepare for surges, to expand our capability, it can easily be overwhelmed with a strategy of moving toward herd immunity.”With new cases…