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As the stigmas mature from their initial white and bifurcate state to yellow and eventually brownish-orange, these color changes - especially the progression to brown - may signal the onset of infection

Lastly, install your batteries, attach the detector to the mounting bracket, and then test your alarm to make sure it is working correctly

It is important to keep in mind that if a monitor detects a pollutant, it does not necessarily mean that an indoor air quality problem exists

doi:10.1136/tobaccocontrol-2020-056451 14

CO and Exercise Capacity Smoking even one cigarette can immediately affect physical exercise capacity