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Veronica Vien, a public information officer for the San Francisco Department of Public Health, said masks like N95 can be uncomfortable to wear for long periods of time and must provide a tight seal around the wearers mouth and nose to work effectively

Studies have shown that exposure to cockroach allergens is a major contributor to asthma for individuals who live in urban areas

"Consumers of e-cigarette products currently have no way of knowing whether e-cigarettes are safe how much nicotine or other potentially harmful chemicals are being inhaled during use, or if there are any benefits associated with using these products," according to the FDA's website

The purifier also has three manual speeds and three auto modes quiet, balanced, and performance that adjust the air-quality monitor's sensitivity

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