Chlamydia is a genus of bacteria that includes C. trachomatis (the common STI) and C. pneumoniae (a respiratory infection).
- The “First Responder”: IgM is the first antibody your body produces when it encounters a new infection.
- Timing: IgM levels typically rise within 1 to 2 weeks of exposure and usually disappear within a few months as the body transitions to long-term “memory” antibodies (IgG).
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