Unventilated, enclosed spaces significantly increase absorption risk Duration of exposure brief passing exposure carries negligible risk
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Some groups are more likely to be harmed by exposure in public places and shared spaces: Babies and children: Higher risk of sudden infant death syndrome (SIDS) More ear infections, asthma attacks, bronchitis, and pneumonia Pregnant people and their babies: Greater chance of low birth weight and pregnancy complications People with asthma, COPD, or heart disease: Smoke can trigger asthma attacks, chest pain, and breathing trouble Older adults: More sensitive to the effects on the heart and lungs Workers in hospitality, casinos, and transportation: Repeated exposure in smokeallowed settings increases health risks Residents of multiunit housing: Smoke can travel through vents, cracks, and hallways, exposing neighbors who do not smoke Consult a Top General Physician The science: how secondhand smoke harms the body

However, long-term pot smokers might experience some uncomfortable symptoms like shortness of breath or chest tightness, but these are often less severe than those faced by tobacco users