HBsAg (hepatitis B surface antigen) is the first serologic marker to appear in a new acute infection, which can be detected as early as 1 week and as late as 9 weeks (range: 6-60 days), with an average of one month after exposure to the hepatitis B virus (HBV).

Hepatitis B surface antibody test determines the presence and quantity of anti-HBs in the blood serum, which can indicate protection from HBV infection. Hepatitis B disease affects the liver and commonly spreads through body fluids such as blood, semen, and vaginal secretions.

Sep 14, 2023 · The hepatitis B surface antibody (HBsAb) test detects and measures antibodies made by the immune system in response to the hepatitis B virus. It is one of the tests used to diagnose hepatitis B and specifically shows how immune you are to the virus.

HBsAg (Hepatitis B surface antigen) - A "positive" or "reactive" HBsAg test result indicates that a person is infected with hepatitis B. This test can detect the presence of the hepatitis B virus (called the “surface antigen”) in the blood.

Hepatitis B Surface Antibody (HbsAb or Anti-HBs) – The "surface antibody" is formed in response to the hepatitis B virus. Your body can make this antibody if you have been vaccinated, or if you have recovered from a hepatitis B infection.

Jan 16, 2024 · What are hepatitis B surface antibodies, and how do they help the immune system? The presence of hepatitis B surface antibodies in the blood indicates a person is recovering from a...

Jun 10, 2021 · A positive or reactive anti-HBs (or HBsAb) test result indicates that a person is protected against the hepatitis B virus. This protection can be the result of receiving the hepatitis B vaccine or successfully recovering from a past hepatitis B infection. This test is not routinely included in blood bank screenings.

Oct 7, 2024 · Hepatitis B surface antibodies (HBsAb) play a vital role in determining your immunity to hepatitis B. Whether through vaccination or past infection, understanding your HBsAb status helps you take control of your health.

Sep 28, 2023 · The hepatitis B surface antibody test (HBsAb) detects antibodies in the blood to determine if someone is immune to the hepatitis B virus (HBV). A negative or nonreactive result means the ...

Hepatitis B surface antigen (HBsAg) is the first serologic marker, appearing in the serum 6 to 8 weeks following HBV infection. In acute cases, HBsAg usually disappears 1 to 2 months after the onset of symptoms with the appearance of HBs antibody (anti-HBs).