"In May 2018 The Aviation Herald received information that about 40-50 minutes into the flight an odour of glue type and burning plastics was detected near main deck door 4L. A family nearby had just oblate oil on their baby, however, the smell of the oblate oil was different to the odour detected near the door. A short time later the flight attendant in the upper deck galley began to vomit and reported there had been an odour of smelly feet during boarding and departure. Ovens and trash compactors were checked without success. During the following about 40 minutes other cabin crew members began to perform abnormally, complaints about headache, dizziness, lightheadedness, nausea, metallic taste in mouth surfaced, the cabin crew members showed itchy red eyes and became increasingly forgetful, aggressive and confused, e.g. replying completely out of context of an ongoing discussion then bluntly denying what just had been said. The worst affected flight attendant was put on oxygen. Medlink was contacted, at that point 12 cabin crew were cause of concern, the captain subsequently decided to divert. Cabin crew were slow in responding to the diversion and prepare the cabin due to inability to function normally and needed to be queried and guided by other crew. After the diversion was changed to Vancouver, which added another hour of flight time, 8 cabin crew were able to get on oxygen, a few other cabin crew went to go to the toilet but were subsequently found anywhere else in the aircraft but the lavatories. In the meantime the captain had donned his oxygen mask, while the two first officers continued without. Cabin crew became concerned they couldn't cover the doors for landing with that many cabin crew already affected and close to being incapacitated. After landing two firefighters with measurement devices and full protective gear boarded the aircraft, many passengers started to use their mobile phones to take photos and videos. Paramedics boarded and began to examine the cabin crew with the most affected being checked first, the paramedics became concerned with all cabin crew and wanted all of them checked. A number of passengers requested medical assistance, too. The worst affected flight attendant vomitted again and collapsed during disembarking. Cabin crew were taken to three different hospitals across the city but declared fit to fly home as passengers the following day."