Measles is so contagious that if one person has it, up to 90% of the people close to that person who are not immune will also become infected.

 

Infected people can spread measles to others from four days before through four days after the rash appears. It is important to remember to always keep surfaces clean and sanitized at all times. The measles virus can live for up to two hours in an airspace after an infected person leaves an area.