In a Michigan State study of public bathrooms, about what share of people washed their hands long enough to meet CDC guidance?

The answer

CDC says scrub with soap for about 15–20 seconds. Researchers watching thousands of bathroom users found only about 5% hit that mark. The average wash lasted around 6 seconds, a third skipped soap, and about 1 in 10 skipped the sink entirely.

Correct answer: About 5%