Syphilis — United States
An explosion of reported early syphilis cases in Clark County [Nevada] since 2012 has been deemed an outbreak by the Southern Nevada Health District. [Las Vegas, with a population of 613 599 in 2014, is the county seat and most populous city in Clark County, which has a population of about 2 million residents ().]
Reported cases of the sexually transmitted disease have skyrocketed 128 percent in Southern Nevada since 2012, with 694 new-onset cases of the disease confirmed in 2015, the
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