PEP must be taken for 28 days to prevent HIV effectively.
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Post-Exposure Prophylaxis (PEP) is a critical treatment designed to prevent HIV infection after potential exposure. It involves taking a prescribed course of antiretroviral medications for 28 days. Many people wonder why PEP must be taken for this specific duration. Understanding the science behind the 28-day regimen can help individuals adhere to the treatment effectively and improve its success rate. How PEP Works in Preventing HIV PEP functions by inhibiting the replication of the HIV virus before it establishes a permanent infection in the body. Once the virus enters the system, it begins integrating itself into the host’s cells, particularly CD4 cells, which play a crucial role in the immune system. The medications in PEP work by blocking this process, preventing HIV from multiplying and spreading. The 28-day treatment is designed to provide continuous suppression of the virus until the risk of infection is eliminated. Skipping doses or stopping early can reduce its e...