can you smoke tobacco while breastfeeding Is smoking safe? If you're pregnant, breastfeeding, or caring for a young baby, it's best not to or vape. But if can't stop, breastfeeding is still recommended. Why Quit Smoking Advice - Allen
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1st Century BC Ancient Maya people are believed to have used tobacco leaves for medicinal and religious purposes

However, second-hand smoke exposure in those who have never smoked would likely bias our results toward a null association

Mismeasurement bias and reverse causality from people quitting smoking due to illness may both have biased our results towards the null
