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Multiple Choice

Hepatitis D has the characteristic that it can only spread in the presence of which virus?

Hepatitis D is a satellite, defective virus that cannot propagate on its own. It relies on the Hepatitis B surface antigen (HBsAg) produced during Hepatitis B infection to form its outer envelope, so HDV can only spread when Hepatitis B is present. This can happen with a coinfection or a superinfection in someone already carrying Hepatitis B. The other options don’t provide the necessary envelope or mechanism for HDV to spread, so they’re not capable of supporting HDV transmission.

Hepatitis D is a satellite, defective virus that cannot propagate on its own. It relies on the Hepatitis B surface antigen (HBsAg) produced during Hepatitis B infection to form its outer envelope, so HDV can only spread when Hepatitis B is present. This can happen with a coinfection or a superinfection in someone already carrying Hepatitis B. The other options don’t provide the necessary envelope or mechanism for HDV to spread, so they’re not capable of supporting HDV transmission.