This is not true. It probably seems like you get over bacterial infections quickly because you’re used to things like small infected cuts. These are opportunistic infections, with bacteria that aren’t really adapted to grow inside your body, so the immune system generally doesn’t have too much trouble. There are plenty of bacterial infections that can be very chronic–tuberculosis is a great example of a very slow-growing infection that can progress for years without your immune system being able to stop it.
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