An infection happens when germs enter a wound past the skin barrier. The presence of microbes doesn't always indicate an injury is infected. The number of bacteria and their degree of pathogenicity (intensity of the infection) determine whether the germs can overwhelm your immune system and cause disease. The infection may affect the skin, or penetrate to the deeper tissues or organs nearest to the wound. You can take care of minor wounds infections at home, but you might have to visit the doctor or emergency room for a more severe injury.
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