Which body fluids are involved in the transmission of Hepatitis B?

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Hepatitis B is primarily transmitted through specific body fluids, making it essential to understand which fluids are involved in its transmission. The correct answer, which identifies blood and semen, is based on the known transmission routes of the Hepatitis B virus (HBV).

Blood is a critical vector for HBV because the virus is highly concentrated in blood and can be transmitted through direct contact with infected blood, such as through sharing needles or exposure to open wounds. Semen also plays a significant role in transmission, particularly in sexual contexts where bodily fluids may be exchanged. The presence of the virus in these two fluids explains why they are associated with higher risks of transmission.

Other body fluids mentioned in the incorrect options do not carry a significant risk for the transmission of Hepatitis B. For example, while some viral particles can be found in saliva, the concentration is not high enough to facilitate transmission under normal circumstances. Similarly, sweat, urine, and breast milk do not pose a substantial risk for transmitting Hepatitis B, making blood and semen the primary fluids of concern.

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