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 Which of the following drug is used for mass prophylaxis for prevention of meningococcal meningitis and explain in detail?
Rifampicin was used formerly but now Ciprofloxacin is the preferred drug for mass prophylaxis for prevention of meningococcal meningitis.