When characters make a Death roll (using Stamina), you cannot push the roll or use STRESS dice. See page 65. Is this also true for Sickness rolls? It seems like it should since it is not a situation where the character is taking an action.
Are there other situations where Stamina rolls can't be pushed? I'm wondering about the Stamina rolls associated with the checks made for hazards? The example on page 72 for Freezing doesn't take pushing into account, but failing the check does add STRESS dice that will be included to the next roll.