This applies to blood, automotive fluids or other substances that may splash on the mask, but its not the case for wildfires
For smoke protection, a valveless N95 is generally recommended
To truly remove smoke, youll need an air purifier with as many carbon pellets as possible
38 The article, when discussing the effects of smoking on the heart, further expressed: Chronic laryngitis, irritability of the throat, morning cough and chronic nasal catarrh are also commonly associated with excessive smoking, especially with excessive cigarette smoking and generally will not yield to treatment until the exciting cause has been removed. 39 The article maintained that excessive smoking could cause irritation to the throat
It depends on the cause, severity and skin sensitivity
You're looking at a sector that's heavily taxed and regulated, but it hasn't dampened the spirits of manufacturers who innovate with filter technologies and flavor blends to keep their customer base hooked