— which subsequently evolved into genotypes 1 and 2 and genotypes 3 and 4, respectively. Whereas genotype 2 remains less commonly detected than other genotypes, genetic evolutionary analyses suggest that genotypes 1, 3, and 4 have spread substantially during the past 100 years. See also Hepatitis A Hepatitis B (Hepatitis B virus) Hepatitis C (Hepatitis C virus) Hepatitis D Hepatitis E Notes References External links Hepeviridae Viral hepatitis