Pfizer's covid vaccine is supposed to be stored and transported at -70˚C, but some batches ended up at -92˚C.
-92˚F is quite close to -70˚C so this smells a lot like an error due to unit conversion. This "anomaly" happened in two separate instances in California and Alabama
(-92˚F - 32) x (5/9) = -68.8˚C
(-70˚C x (9/5)) + 32 = -94˚F
Source: https://www.cnbc.com/2020/12/16/covid-vaccine-us-quarantines-pfizer-shipments-in-california-alabama-after-transit-anomaly.html