Radio astronomers from the University of Illinois, Champaign-Urbana, found faint traces of vinegar, or acetic acid, in a cloud of gas and dust named Sagittarius B2 North.
During World War I, for example, they made the brilliant discovery that a message written in acetic acid on the outside of an egg would disappear, once the egg was boiled, into the inside.
Women in the test groups were screened using one of three tests: a pap smear, an HPV test or a visual inspection of the cervix after application of acetic acid (VIA), a component .