We all know that person who never brushes their teeth, but seems never to get drilled in the dentist's chair. Why are they special? We also know the person who no matter how diligent they are with oral hygiene is constantly in the dentist's office. Why are they unlucky? The most common infectious disease in humans is dental caries, commonly referred to as cavities. This has plagued humanity since it became a species, and continues to this day. It disproportionately is suffered by those in the lower socioeconomic classes and in the global south. Conventional wisdom suggests that all that is needed is a good tooth-brushing regimen, and everything will be fine. But we know this is false. We now know that the cavity phenomenon is modulated by bacteria, and now that we can manipulate the genetic material of bacteria, we can eliminate this disease. Come see how we did it, get the new genetically modified bacteria which is the cure for yourself, and help save teeth all over the world.