| Hepatitis
A (HAV) |
Single-stranded
RNA |
Picornaviridae |
Fecal–oral
transmission; no chronic infection; vaccine available |
| Hepatitis
B (HBV) |
Partially
double-stranded DNA |
Hepadnaviridae |
Transmitted
via blood, sexual, and vertical routes; chronic infection
possible; vaccine available |
| Hepatitis
C (HCV) |
Single-stranded
RNA |
Flaviviridae |
High rate of
chronic infection; no vaccine; curable with direct-acting
antivirals |
| Hepatitis
D (HDV) |
Single-stranded
circular RNA |
Unclassified
(requires HBV) |
Defective
virus; requires HBV for replication; worsens HBV outcomes |
| Hepatitis
E (HEV) |
Single-stranded
RNA |
Hepeviridae |
Fecal–oral
transmission; usually self-limited; severe in pregnancy;
vaccine available in China |