The Air Travel Bubble Hypothesis
Every time two countries announce an air travel bubble, one of them will see a spike in corona cases closer to the flight date, dashing hopes of paid travellers, who would nevertheless be consoled that they would be given first priority for the next fight if they were not to cancel their booking.
On the one occasion when the air travel bubble hypothesis was apparently proved wrong, the decades-old Soviet plane that was carrying a few dozen Russian mercenaries and terrorists was never heard again after take-off—had the ATB hypothesis struck in a more deadly form?