WHO Declares Hepatitis D as Carcinogenic

In July 2025, the World Health Organization’s International Agency for Research on Cancer (WHO-IARC) classified hepatitis D virus (HDV) as carcinogenic to humans, highlighting its strong link to liver cancer and urging increased screening and access to treatments.

What is Hepatitis D?

  • A liver infection caused by hepatitis delta virus (HDV).
  • HDV cannot exist on its own — it requires hepatitis B virus (HBV) to replicate.
  • An infection can occur as:
    • Coinfection: HDV and HBV acquired together.
    • Superinfection: HDV acquired after an existing HBV infection.
  • Can be acute (short-term, weeks to months) or chronic (lasting beyond six months).

Why is this significant?

  • HDV raises the ....
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