I found this paper after a bit of digging and it has all the usual caveats. It’s based on five US airlines, covering nearly two years of data. Nonetheless, a large chunk of data to peruse. Here is the
Link
“The communications center received calls about 11,920 in-flight medical emergencies among an estimated 744 million airline passengers during the study period, for a rate of 16 medical emergencies per 1 million passengers. There were 7,198,118 flights by the included airlines during the study period, for an incidence of 1 in-flight medical emergency per 604 flights.”
Table 1 states that of the 11,920 emergencies - 265 were allergy related of which 12 resulted in a diversion, 8 ended up in hospital and zero deaths.
That’s 12 diversions for 7,198,118 flights or 1 diversion per 599,843 flights. With no deaths.
And according to Google since 1978 you have an approximately 1 in 188,000 chance of dying in an aircraft accident.
So about three times
less likely to
solely divert to all allergic reactions reported in the above study than to die in a crash.
I feel like I have answered my own question
