A $4 tongue swab test detects tuberculosis within 30 minutes A new $4 tongue swab test can detect tuberculosis in 30 minutes, offering a portable and affordable diagnostic tool for millions with limited access to health care. The rapid test aims to replace slower, more expensive methods currently used in remote and underserved regions. A $4 tongue swab test detects tuberculosis within 30 minutes The portable test could help millions with limited access to health care This is a human-written story voiced by AI. Got feedback? Take our survey https://docs.google.com/forms/d/e/1FAIpQLSfw1yaOK0bBsHcFWa1rAtcNVM1jukBkJo8Fw uj-5XTV4CnJQ/viewform . The portable test could help millions with limited access to health care This is a human-written story voiced by AI. Got feedback? Take our survey https://docs.google.com/forms/d/e/1FAIpQLSfw1yaOK0bBsHcFWa1rAtcNVM1jukBkJo8Fw uj-5XTV4CnJQ/viewform .