An asymptomatic presentation would not include a chest x-ray. People with visible lung lesions and 60% oxygenation levels doe not exhibit any symptoms. The body

An asymptomatic presentation would not include a chest x-ray. People with visible lung lesions and 60% oxygenation levels doe not exhibit any symptoms. The body's warning system is wired to C02 concentrations, and C02 gets evacuated so people report feeling fine while they have significant lung damage.