What if you spit it out? Or what about french-kissing someone, can you give this bacteria to the other person that way?
Will this spread to everyone I kiss?
It’s very unlikely in non-immunocompromised adults. However, if you’re concerned, you should avoid kissing anyone taking oral antibiotics, or children.
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The key is whether the unknown active management of this bacteria is preferable to the immense expense and problems of tooth decay.