WASHINGTON, DC - AUGUST 31: Georgetown University Law Center's O'Neill Institute for National and Global Health Law Professor Lawrence Gostin participates in a panel discussion on the Zika virus at the law center August 31, 2016 in Washington, DC. Centers for Disease Control and Prevention Director Dr. Thomas R. Frieden said that his agency has spent $194 million of the $222 million in federal funds set to fight the Zika virus and that if Congress did not budget more money to fight the disease. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - AUGUST 31: Georgetown University Law Center's O'Neill Institute for National and Global Health Law Senior Scholar Daniel Lucey participates in a panel discussion on the Zika virus at the law center August 31, 2016 in Washington, DC. Centers for Disease Control and Prevention Director Dr. Thomas R. Frieden said that his agency has spent $194 million of the $222 million in federal funds set to fight the Zika virus and that if Congress did not budget more money to fight the disease. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - AUGUST 31: The U.S. National Institutes of Allergy and Infectious Disease Director Dr. Anthony Fauci gives a presentation about the Zika virus at the Georgetown University Law Center's O'Neill Institute for National and Global Health Law August 31, 2016 in Washington, DC. Centers for Disease Control and Prevention Director Dr. Thomas R. Frieden said that his agency has spent $194 million of the $222 million in federal funds set to fight the Zika virus and that if Congress did not budget more money to fight the disease. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - AUGUST 31: The Center for Strategic and International Studies Director Stephen Morrison participates in a panel discussion on the Zika virus at the Georgetown University Law Center's O'Neill Institute for National and Global Health Law August 31, 2016 in Washington, DC. Centers for Disease Control and Prevention Director Dr. Thomas R. Frieden said that his agency has spent $194 million of the $222 million in federal funds set to fight the Zika virus and that if Congress did not budget more money to fight the disease. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - AUGUST 31: Georgetown University Law Center's O'Neill Institute for National and Global Health Law Professor Lawrence Gostin (L) and U.S. National Institutes of Allergy and Infectious Disease Director Dr. Anthony Fauci participate in a panel discussion on the Zika virus at the law center August 31, 2016 in Washington, DC. Centers for Disease Control and Prevention Director Dr. Thomas R. Frieden said that his agency has spent $194 million of the $222 million in federal funds set to fight the Zika virus and that if Congress did not budget more money to fight the disease. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - AUGUST 31: The U.S. National Institutes of Allergy and Infectious Disease Director Dr. Anthony Fauci participates in a panel discussion on the Zika virus at the Georgetown University Law Center's O'Neill Institute for National and Global Health Law August 31, 2016 in Washington, DC. Centers for Disease Control and Prevention Director Dr. Thomas R. Frieden said that his agency has spent $194 million of the $222 million in federal funds set to fight the Zika virus and that if Congress did not budget more money to fight the disease. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - AUGUST 31: The Center for Strategic and International Studies Director Stephen Morrison participates in a panel discussion on the Zika virus at the Georgetown University Law Center's O'Neill Institute for National and Global Health Law August 31, 2016 in Washington, DC. Centers for Disease Control and Prevention Director Dr. Thomas R. Frieden said that his agency has spent $194 million of the $222 million in federal funds set to fight the Zika virus and that if Congress did not budget more money to fight the disease. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - AUGUST 31: The U.S. National Institutes of Allergy and Infectious Disease Director Dr. Anthony Fauci participates in a panel discussion on the Zika virus at the Georgetown University Law Center's O'Neill Institute for National and Global Health Law August 31, 2016 in Washington, DC. Centers for Disease Control and Prevention Director Dr. Thomas R. Frieden said that his agency has spent $194 million of the $222 million in federal funds set to fight the Zika virus and that if Congress did not budget more money to fight the disease. (Photo by Chip Somodevilla/Getty Images)