If theres billions of bacteria in our mouths, how come when we cut our inner lip we’re not guaranteed an infection?

Question

If theres billions of bacteria in our mouths, how come when we cut our inner lip we’re not guaranteed an infection?

In: 85

Answer 1

Technically mouth wounds *are* infected. But we often use ‘infected’ to mean that our bodies are failing to fight off rapidly-growing bacteria, rather than that bacteria are present in an area.