This is a collection of symbols for communicating infection control situations and best practices, from simple hand hygiene reminders to warnings of outbreak or isolation situations. From the documentation:

“After years of development we realized that our infection control symbols had the potential to be this common language for public health. So, we compiled it in this package and are releasing it under Creative Commons in order to increase awareness, reduce barriers to implementation and ultimately be available where needed to save lives. The world needs to
speak the same language when it comes to infection control.

This package contains the complete set of symbols in several different computer file formats and is made to be shared via the internet.”

Project and documentation at: http://www.taggcleanhands.com/icsymbolpack