In Maine, it is illegal to smoke or vape when a child is in the vehicle with you. Keep your loved ones safe from the harms of secondhand smoke and vape aerosol asthma tobacco Asthma Initiative of Michigan Passive smoking (secondhand smoke) is extremely harmful to children, especially infants. Because infants breathe faster than adults, they inhale more smoke toxins per minute. This exposes them to dangerous chemicals like nicotine, Secondhand smoke and secondhand aerosol