Detailed Instructions: Given a passage with a question and an answer to that question, classify if the answer actually answers the question into 'yes' or 'no'. Output 'yes' if the answer answers the question and output 'no' if the answer does not answer the question.
Problem:Question: Are interferon and Tumor Necrosis Factor Essential Parameters of CD4+ T-Cell Responses for Vaccine Control of Tuberculosis?
Answer: Induction of TH1 cells that coexpress IFN- and TNF is not a requirement for vaccine efficacy against M. tuberculosis, despite these cytokines being essential for control of M. tuberculosis in nonvaccinated animals.
Solution:
no