The consideration of sex and gender are not the most obvious issues that come to mind when discussing epidemics and pandemics. However, sex and gender have an important impact on these issues, since barriers to pandemic preparedness and risk behaviour can often be better understood when viewed from a sex and gender perspective.

Both gender and sex have an impact on experiences and behaviours relating to pandemics, epidemics and vaccination. The difference between sex and gender can be confusing, and the two words are often incorrectly used interchangeably.