Stock Photo - A scanning electron micrograph of Streptococcus pneumoniae, a nasty bactrium that causes not only pneumonia but endocarditis, peritonitis, pericarditis, ear infections, brain abscesses, and meningitis. Photo by Janice Carr.

Stock Photo: A scanning electron micrograph of Streptococcus pneumoniae, a nasty bactrium that causes not only pneumonia but endocarditis, peritonitis, pericarditis.

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