Answer
Yes. A negative result greatly reduces but does not eliminate the risk, so compatible symptoms still require urgent assessment.
Sources for this answer
- Abacavir/Lamivudine Dr. Reddy's 600 mg/300 mg Film-Coated Tablets — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.