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The time since quitting smoking among former smokers showed no significant relationship with COVID-19 severity (p=0.657)

Mucocutaneous symptoms can develop at the same time, or years later, causing nasal congestion, frequent nose bleeds, and sores in the nose or mouth

Nicotiana tabacum , , , , , , - ' , ' (World Health Organization) 80 , ' 13 ' ' 7,000 70 , , , WHO 90% 80% COPD 2-4 , Passive smoking 12 - NFHS 6

They usually heal within 6 days without scarring the skin