Tooth decay isn’t the only threat to your oral health. As the leading cause of tooth loss, gum disease is equally devastating. Although good oral hygiene habits can prevent the infection, the Centers for Disease Control and Prevention estimates at least 50% of adults have a stage of gum disease, like gingivitis. It’s caused by bacteria found in plaque and tartar buildup. While you might believe bleeding or swollen gums aren’t alarming, your smile isn’t the only thing at risk. The infection can spread through saliva, which means it is contagious. Here’s what you need to know before puckering up for a kiss or sharing a drink.

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