Hepatitis B surface antibody (anti-HBs):

The NHS (UK) is NOT infallible. I’ve pointed out as well the AI situation re the use of computers and other systems ?? No one should be under any illusion that they are the answer to the increased patient work load, the lack of staff, the inexperienced and impatient let alone negligent who fail to post results, lose test samples and??
Hepatitis B?? Well read on and realize that amongst all my other issues it has to be included and NOT forgetting the heightened risks re for developing cirrhosis, liver failure, or liver cancer.

MEDICATIONS and other treatments that can affect or have an adverse effect on the liver?? Do I dismiss their side effects knowing that my liver is already compromised??

Methotrexate has been associated with a range of liver related adverse events ranging from asymptomatic transaminase elevations to fibrosis and fatal hepatic necrosis. Concern over potential liver toxicity has resulted in treatment avoidance, cessation, or recommendations for investigations which may be costly, invasive and unwarranted. Modern laboratory monitoring of liver blood tests may also influence the risk of more serious complications.
The majority of present day studies report an approximate doubling of the relative risk of elevated transaminases in methotrexate treated patients but no increased risk of symptomatic or severe liver related adverse events. In this article we will review the evidence around methotrexate and liver related adverse events.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5612840/ __________________________________________________________________________________________

The presence of anti-HBs is generally interpreted as indicating recovery and immunity from hepatitis B virus infection. Anti-HBs also develops in a person who has been successfully vaccinated against hepatitis B. Among vaccine responders who completed a vaccine series, anti-HBs levels can decline over time, however the majority are still immune and will mount a response when exposed to HBV.
If you test positive for the hepatitis B virus for longer than 6 months, this indicates that you have a chronic hepatitis B infection.

All patients with chronic hepatitis B infections, including children and adults, should be monitored regularly since they are at increased risk for developing cirrhosis, liver failure, or liver cancer.

The objective of this study was to determine the frequency and load of hepatitis B virus (HBV) DNA in anti-HBc–positive first-time blood donors; it was designed to contribute to determining whether anti-HBc screening of blood donations might reduce the residual risk of posttransfusion HBV infection. ~
A total of 14 251 first-time blood donors were tested for anti-HBc using a microparticle enzyme immunoassay; positive results were confirmed by a second enzyme-linked immunosorbent assay (ELISA).
For the detection of HBV DNA from plasma samples, we developed a novel and highly sensitive real-time polymerase chain reaction (PCR) assay. The 95% detection limit of the method amounted to 27.8 IU/mL, consistent with the World Health Organization (WHO) international standard for HBV DNA.
A total of 216 blood donors (1.52%) tested anti-HBc–positive in both tests, and 205 of them (16 HBsAg+, 189 HBsAg−) were tested for HBV DNA. In 14 (87.5%) of the HBsAg-positive blood donors, HBV DNA was repeatedly detected, and in 3 (1.59%) of the HBsAg-negative donors, HBV DNA was also found repeatedly.
In the 3 HBV DNA–positive, HBsAg-negative cases, anti-HBe and anti-HBs (> 100 IU/L) were also detectable. HBV DNA in HBsAg-negative as well as HBsAg-positive samples was seen at a low level. Thus, HBV DNA is sometimes found in HBsAg-negative, anti-HBc–positive, and anti-HBs–positive donors.
Retrospective studies on regular blood donors and recipients are necessary to determine the infection rate due to those donations. Routine anti-HBc screening of blood donations could probably prevent some transfusion-transmitted HBV infections.
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Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Naturally Acquired Immunity versus Vaccine-induced Immunity, Reinfections versus Breakthrough Infections: A Retrospective Cohort Study

https://www.youtube.com/watch?v=IiA1S6NvCo4&t=606s