Tutoring biology, diseases are mentioned. The tutor names perhaps the most contagious one.

Measles is potentially the most contagious disease among humans. In particular, all children in a natural, unvaccinated population will catch it.¹

When I was a kid, I heard about measles, but didn’t catch it. I believe I was immunized against it at some point. I never hear about it now, likely because children are typically vaccinated.

Measles can be fatal, by complication to pneumonia or swelling of the brain.

Source:

¹Mader, Sylvia S. Inquiry into Life, 11th ed. Toronto: McGraw Hill, 2006.

www.npr.org

www.canada.ca/en/public-health/services/diseases/measles

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.