A good screening test should meet several key criteria: 1. Validity: The test should accurately distinguish between those with and without the disease. 2. Reliability: The test should provide consistent results when repeated under the same conditions. 3. Sensitivity: The ability of the test to correctly identify those with the disease. 4. Specificity: The ability of the test to correctly identify those without the disease. 5. Cost-effectiveness: The benefits of the test should justify its costs.
