Dying in the air
"A 19-year-old British woman died Monday on board a Virgin Atlantic flight from Miami to London's Heathrow Airport, the airline said. A day earlier, two passengers on a British Airways flight from Miami to Heathrow"
Some mystery deaths have occurred on London Flights. There are a couple of people who died from viral meningitis at some that have died from still unknown reasons. They haven't been old or with known disabilities.
Viral meningitis isn't deadly for grown people with healthy immunesystems.