Question

tuberculosis (part 1) • active tb signs and symptoms
a cough that lasts longer than three weeks
yes no

Explanation:

Since this is a question about identifying a symptom of active tuberculosis, and it's related to medical knowledge which falls under the Natural Science discipline, specifically the subfield of Medicine and Health. But as per the task, if we assume this is a question asking whether a cough lasting longer than three weeks is a sign of active TB (and we know that in medical knowledge, a persistent cough (longer than 3 weeks) is a common sign of active tuberculosis), here's the answer:

A cough lasting longer than three weeks is a recognized sign of active tuberculosis (TB). Medical literature and clinical knowledge confirm that this is one of the key symptoms of active TB.

Answer:

Yes