[aparashk]

In a mine -- constricted space of very small volume with forced ventilation -- the conditions would be ideal for getting infected with a very high initial viral load. Under these conditions, it is not unreasonable that immunity of any kind (from infection or vaccination) would not be sufficient to prevent symptomatic COVID19 infections.

[yosito]

Not that mines have a great reputation for safe operation, but who made the call to allow unvaccinated people to continue working in the mine?