You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is The usefulness of a screening test in a community depends on its- and explain in detail?
Ref:Parks 23rd edition pg 139 An ideal screening test should have 100% sensitivity. Sensitivity is defined as the ability of a test to identify correctly all those who have the disease, that is "true positive"