Ключевые слова: adult, at risk, background, bacteria, blank, blank space, bone, copy space, dead, death, death rate, design space, donning, edit space, epidemic, flu, free space, head, health, high risk, human, life, life risk, mask, mask wearing, medical, out of time, pandemic, protect, protection, risk, skeleton, skull, space, surgical mask, text space, virus, wearing,