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The elderly; very young; and people with underlying pulmonary conditions such as Asthma, Allergies, chronic obstructive pulmonary disease; stroke patients with difficulty swallowing leading to aspiration of saliva or foods; alcoholics and drug abusers who aspirate while blacked out; drug abusers who inhale powdered drugs; near drowning victims; workers around chemical fumes and chemicals; miners; firemen; the immunocompromised like those with HIV/AIDS, or transplant, and chemotherapy patients.

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16y ago

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