Hepatitis A virus is infectious at which dose?

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Multiple Choice

Hepatitis A virus is infectious at which dose?

Explanation:
Hepatitis A is highly infectious by the oral-fecal route, so only a small amount of virus is needed to establish infection. Its stability as a non-enveloped virus helps it survive passage through the stomach and reach the intestinal lining, where it can initiate infection. Because of this high infectivity, the infectious dose is low, meaning that even tiny exposures—such as a small amount of contaminated food or water—can cause disease. That’s why the correct choice emphasizes low doses.

Hepatitis A is highly infectious by the oral-fecal route, so only a small amount of virus is needed to establish infection. Its stability as a non-enveloped virus helps it survive passage through the stomach and reach the intestinal lining, where it can initiate infection. Because of this high infectivity, the infectious dose is low, meaning that even tiny exposures—such as a small amount of contaminated food or water—can cause disease. That’s why the correct choice emphasizes low doses.

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