Follow one selected response from antigen encounter to a possible later response. Compare vaccination with infection, then compare the first exposure with a later encounter.
INTERACTIVE IMMUNE RESPONSE MODEL
Follow the response from first exposure to memory
At a first exposure to a particular A molecular feature that an antibody or immune-cell receptor can recognize. Recognition does not always cause a harmful or protective response., matching naive B and Lymphocytes whose receptors recognize specific peptides displayed by MHC molecules; different T-cell types have different functions. are uncommon. The innate response can help set the conditions for an adaptive response; this model shows selected steps, not every A set of connected chemical steps in a cell, where one reaction's products can feed another..
Vaccination; first exposure. Step 1 of 6: An antigen is encountered.
STEP 1 OF 6Vaccine antigen · First exposure
An antigen is encountered
A A preparation that presents antigens or instructions for making them to help the immune system build a response; platforms and outcomes differ. presents selected antigenic information—an A molecular feature that an antibody or immune-cell receptor can recognize. Recognition does not always cause a harmful or protective response. or instructions for making one—without requiring the person to experience the target disease. A preparation that presents antigens or instructions for making them to help the immune system build a response; platforms and outcomes differ. platforms differ in what they deliver.
Hepatitis B serology: vaccine response or past infection?
An antibody against hepatitis B surface antigen. It may follow vaccination or recovery from infection, so it is read with other hepatitis B markers. can be present after successful An intervention that presents antigenic information to help establish an immune response and, for some vaccines, memory. or recovery from hepatitis B, so that marker alone cannot identify the immune history. Total An antibody against hepatitis B core antigen. It indicates past or current hepatitis B infection and is not produced by vaccination alone. indicates past or current HBV infection and is not produced by An intervention that presents antigenic information to help establish an immune response and, for some vaccines, memory. alone.
TYPICAL VACCINE-IMMUNITY PATTERN
Anti-HBs may be present
A typical pattern after a completed, successful A preparation that presents antigens or instructions for making them to help the immune system build a response; platforms and outcomes differ. series is Hepatitis B surface antigen, a viral protein used with other markers to assess current or past infection and immunity.-negative, total An antibody against hepatitis B core antigen. It indicates past or current hepatitis B infection and is not produced by vaccination alone.-negative, and An antibody against hepatitis B surface antigen. It may follow vaccination or recovery from infection, so it is read with other hepatitis B markers.-positive. An antibody against hepatitis B surface antigen. It may follow vaccination or recovery from infection, so it is read with other hepatitis B markers. may decline over time. Hepatitis B surface antigen, a viral protein used with other markers to assess current or past infection and immunity. can appear transiently soon after a HepB dose, so timing and the full panel matter.
After resolved infection, total An antibody against hepatitis B core antigen. It indicates past or current hepatitis B infection and is not produced by vaccination alone. remains a marker of past infection and An antibody against hepatitis B surface antigen. It may follow vaccination or recovery from infection, so it is read with other hepatitis B markers. may also be present. A full panel and clinical context are needed to interpret the pattern.
This is a simplified classroom comparison, not interpretation of an individual test. CDC recommends reading hepatitis B Testing blood for antibodies or antigens; hepatitis B results are interpreted from a combination of markers and clinical context. as a panel; marker patterns depend on timing and clinical context.
These references support the general immunology model and the vaccine/serology distinctions. They do not establish that every vaccine or infection follows the same sequence or produces identical protection.