Testing for conditions and diseases can be lifesaving. For example, routine screenings for cancer can help doctors catch a problem early and provide patients with potentially life saving care. Additionally, testing for diseases which spread between people, from sexually transmitted diseases to COVID-19, is crucial for public health.

Over the past year and a half, you may have found yourself with a swab up your nose while getting tested for COVID-19. But did you know that the cotton swab was invented in the 1920s?