- surgical mask and gloves lowered coolness
- medical splint lowered coolness
- empty PPE-Bag lowered coolness
- full PPE-Bag lowered coolness
reasoning: those are semi-essential for disease feature,
therefore it's important to have the otion to get them soon.
and all are rather common items in the real world, so that's reasonable
Typo Fix
- typo fix in merchant inventory