'infection' originates from Latin, specifically the word 'infectio,' where 'in-' meant 'into' and 'facere' meant 'to make.'

'infectio' transformed into the Old French word 'infection,' and eventually became the modern English word 'infection' through Middle English.

Initially, it meant 'to make unclean or corrupt,' but over time it evolved into its current meaning of 'the process of infecting or being infected.'