for Veterans and the Public

The hepatitis C genotype is a type or "strain" of hepatitis C virus. There are 6 genotypes of hepatitis C around the world. In the United States, 3 genotypes are common:

• Genotype 1
• Genotype 2
• Genotype 3

These can be further specified as:

• Genotype 1a or 1b
• Genotype 2a or 2b
• Genotype 3a or 3b

The genotype of hepatitis C does not change over time. It needs to be tested only once. If you are treated for hepatitis C, your genotype will determine your treatment plan, such as which medications are prescribed and how long the treatment will be.