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 A patient who was initially smear positive, who began the treatment and who remained or became smear positive again at five months or later during the course of treatment is called as and explain in detail?
Failure case: A patient who was initially smeared positive, who began Rx and who remained or became smear positive again at five months or later during the course of Rx. Relapse: A patient who returns sputum smear positive having previously been treated for tuberculosis and declared cured after the completion of his treatment. Return after default: A patient who returns sputum smear positive, after having left Rx for at least two months.