A large clinical trial in India found that swabbing a woman's cervix with vinegar could detect abnormal cells that lead to cervical cancer. Nearly 90% of a group of more than 150,000 women participated in the study and researchers needed only four weeks to train local women on how to administer the low-tech test. If this screening tool is implemented throughout India, the study estimates that 22,000 cervical cancer deaths could be prevented each year. If the testing is used in other developing countries, an estimated 72,000 lives could be saved annually.

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