[LorenPechtel]

Actually, we can estimate odds even with zero deaths.

The thing is regardless of the trigger anaphylaxis is anaphylaxis. The severity differs, the mechanism is the same. We can see the distribution of reactions and estimate the number that will be lethal even if we have no examples.

(And I rather suspect that a fair number of the lethal cases don't get diagnosed. I don't believe autopsy will reveal what set it off unless the contaminant is obvious.)