HBsAg is the hallmark of HBV infection and is the first serological marker to appear in acute hepatitis B. Most patients recovering from acute hepatitis B clear HBsAg within 4-6 months after onset ...

And if you’re pregnant, you can pass it on to your newborn. Viral hepatitis is an inflammation of your liver that's caused by a virus. The most common ones in the U.S. are hep A, B, and C.