Thermal scanning at ports of entry is not as effective in keeping rare deadly pathogens out as one may hope, says Hsu Li Yang from the Saw Swee Hock School of Public Health. SINGAPORE:  Singapore stopped temperature screening in airports from Monday (Feb 23), less than a month after it was introduced as a precautionary measure against the Nipah virus .  The health ministry said that no cases had been reported locally and that the outbreak in India had stabilised. But some netizens are still