Final answer:
The test that would be ordered for Jess is the one that is positive for Anti-HBs and negative for the other markers. These results indicate that Jess still has immunity from her childhood hepatitis B immunizations.
Step-by-step explanation:
To determine Jess's hepatitis B immunity status, specific blood tests are crucial. If Jess received Hepatitis B vaccinations and has maintained immunity, her test results would likely show HBsAg (Hepatitis B surface antigen) as negative, Anti-HBc (antibodies to Hepatitis B core antigen) as negative, and Anti-HBs (antibodies to Hepatitis B surface antigen) as positive. These results indicate immunity due to Hepatitis B vaccination. If she had a natural infection, the results might show HBsAg as negative, Anti-HBc as positive, and Anti-HBs as positive. However, if Jess is acutely infected, her results may reveal HBsAg as positive, Anti-HBc as positive, and IgM Anti-HBc (IgM antibodies to Hepatitis B core antigen) as positive. Interpretation depends on the specific combination of these markers.