True enough, but it&#x27;s internal wounds where antibiotics are most useful. There are also a fair number of Antibacterial herbs for external wound treatment that where in use.  Even just honey can be useful.  A flowing stream is not sterilized, but can be used for wound treatment, the ocean is also useful for this.<p>The point is it&#x27;s not as bad as you might think. Consider cavities, without refined sugar and massive quantities of grains there actually far less common.<p>That said, late stage hunter gathers where probably much worse off.