A zika-like virus killed 10 percent of those in America’s capital, Philadelphia

The US has experienced 25 major problems with one mosquito
that exact same mosquito now carrys the Zika virus

History_of_yellow_fever in Wikipedia

• 'At least 25 major outbreaks followed in North America, such as in Philadelphia 1793,. . . "
  "The American government, including George Washington, had to flee the city, which was the capital of the United States at the time."
• “The fever in 1793 is the reason why the capital of the United States is not in Philadelphia
• “In 1878, about 20,000 people died in an epidemic in towns of the Mississippi River Valley and its tributaries.”
• “The 1853 outbreak claimed 7,849 residents of New Orleans”

Portion of a table from Mosquito-borne_disease in Wikipedia

1793 Philadelphia yellow fever epidemic - Wikipedia

• "5,000 or more people were listed in the official register of deaths between August 1 and November 9. The vast majority of them died of yellow fever"
• "Then the largest city in the US, with around 50,000 residents,"
• "Major port cities such as Baltimore and New York had quarantines against refugees and goods from Philadelphia"

PBS American Experience - The Great Fever - Oct 2006

1793-1905
http://www.pbs.org/wgbh/amex/fever

Compare that map to Zika suitability map of April 2016

I strongly believe that Zika Birth Defects can be greatly reduced if pregnant women have lots of vitamin D

Virus articles in Vitamin D Life