Syphilis — United States
Syphilis is a highly contagious sexually transmitted disease that can be cured with penicillin. After the introduction of penicillin in the United States in the 1940s, a downward trend in the number of reported U.S. cases of syphilis occurred during most of the rest of the 20th century, except for an outbreak in the early 1990s.
However, since 2002 there has been a resurgence of syphilis in the United States. Much of this increase is attributable to men having sex with men, but syphilis in
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