The OD and SCO values are the results of the Hepatitis B Two Half test. Hepatitis B two-half that is hepatitis B 5 tests, and hepatitis B two-half od index indicates the absorbed optical density of the detected substance, S in SCO indicates the previous OD value, and the CO test result is also the reference value, which is clinically known as the critical value. If the OD and SCO values are positive through the hepatitis B two half, it means that the body has been infected with hepatitis B, suggesting that there is a hepatitis B virus in the body, and then it has to be analyzed through the hepatitis B DNA test, which can be used to understand whether the virus is in a replicating state in the body. OD value and SCO index are only for preliminary diagnosis of hepatitis B. Later on, it should be analyzed in combination with other tests, mainly including liver ultrasound and liver function tests, etc. If it is diagnosed to be caused by infection of the virus, tenofovir and other anti-viral medications should be taken orally under the guidance of the doctor. When abnormal OD and SCO values are found in the examination, one should be alerted to Hepatitis B, and should consult the doctor in time to avoid delaying the condition.