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 statement regarding HIV infection is true? and explain in detail?
Postexposure prophylaxis after a needle stick injury, should be initiated as quickly as possible, preferably within 1 to 2 hours. CDC guidelines recommend two general alternatives: a basic regimen, which consists of two-drug therapy, often consisting of azidothymidine and lamivudine, and an expanded regimen, which adds a third drug, such as indinavir or nelfinavir. Ref: Harrisons Internal Medicine, 18th Edition, Chapter 189 ; Tintinalli's Emergency Medicine: A Comprehensive Study Guide, 7th Edition, Chapter 149