Airlines are turning to some of the world’s hardest-hitting disinfectants, capable of stopping everything from sexually transmitted diseases to the MRSA superbug, in the fight against the coronavirus. Qantas Airways, Korean Air Lines and Singapore Airlines’ Scoot unit are among carriers that helped evacuate people from the outbreak’s epicenter, the Chinese city of Wuhan, and from a cruise ship off Japan. They’ve stepped up aircraft-cleaning efforts as a result, trying to ensure that planes used in rescue missions are safe to be put back into commercial use. The standard vacuum-and-wipe cleanup on board has turned into hospital-grade sterilizations. How was this done? And are there any risks for passengers using the planes when they return to service? Here are some answers: What cleaning products are used? Qantas used Viraclean , a hospital-grade disinfectant made by Sydney-based Whiteley Corp. It’s a pink, lemon-scented liquid that kills a range of bacteria and viruse...