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Fluoride was added to toothpaste as early as the 1890s, though it wasnt until 1955 that Crest produced the first clinically proven fluoride toothpaste

(WPMI) According to the American Journal of Respiratory and Critical Care Medicine, puffing on an e-cigarette disrupts your normal immune response to viral infections, like flu

Associations between ambient particulate matter and nitrogen dioxide and chronic obstructive pulmonary diseases in adults and effect modification by demographic and lifestyle factors

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Saudi Arabia and Oman are projected to remain low and stable, below 8%