Molecular mimicry is when pathogens like streptococcal bacteria have antigens that resemble our own tissues, so the immune system attacks both the infection and, mistakenly, the heart or joints, leading to rheumatic fever. From a public health standpoint, this is why we must prioritize robust primary care to treat strep throats promptly—it is far more cost-effective than managing lifelong cardiac sequelae. My own slow study for the clerk exam reminds me that prevention is always simpler than a complex cure. Seeing my wife manage post-fever complications at the clinic, *hevem*, I know our resources are better spent ensuring no child misses that first dose of antibiotic.
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