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Pelvic inflammatory disease. Chlamydia or gonorrhea spreads up the vagina into the uterus and then t
Sunlight consists of a spectrum of colors, visible here in a rainbow.
Risks of infectious disease increase in (a) high-density agricultural populations compared to (b) lo
Peptic ulcer disease (PUD).
In Canada, disease-related deaths become increasingly common during middle adulthood
A sampling of bacterial diversity. Most bacteria do not cause disease.