My "theory" (maybe hypothesis is more like it) is that it has something to do with africanized bees mixing with domestic bees. Possibly the new bees are more susceptible to disease.
One of the best French door fridges we've tested
A good-looking fridge with useful features like an auto-filling water pitcher and a temperature-adjustable "FlexZone" drawer. It was a near-flawless performer in our cooling tests.