Lyme Evidence Sheet
Reviewed 2026-07-24Can a Lyme test be negative early?
Yes. Antibody tests can be negative in the first few weeks after infection because the immune response may not yet be detectable.
What the evidence says
- Lyme antibody tests look for an immune response rather than directly confirming every early infection.
- CDC notes that antibody tests can be falsely negative during the first few weeks after infection.
What this can tell you
- Why timing can change how informative an antibody result is.
- Why the complete clinical context still matters.
What this cannot tell you
- Whether a person has Lyme disease.
- What another cause of symptoms might be.
A useful question for your clinician
Given when my symptoms or possible exposure began, how should this result be interpreted?
Sources (2)
- Centers for Disease Control and Prevention. ‘Testing and Diagnosis for Lyme Disease.’ https://www.cdc.gov/lyme/diagnosis-testing/index.html. Accessed July 24, 2026. Open source ↗
- Centers for Disease Control and Prevention and Association of Public Health Laboratories. ‘Suggested Reporting Language, Interpretation and Guidance Regarding Lyme Disease Serologic Test Results.’ 2024. https://www.cdc.gov/lyme/media/pdfs/2024/05/Suggested-Reporting-Language-Interpretation-and-Guidance-Regarding-Lyme-Disease-Serologic-Test-Results.pdf. Open source ↗