• Pills
  • In this Jan. 27, 2016, file photo, samples of Aedes aegypti mosquitoes, responsible for transmitting dengue and Zika, sit in a petri dish at the Fiocruz Institute in Recife, Pernambuco state, Brazil.
  • Children display ribbon cut-outs tied to balloons during an HIV/AIDS awareness campaign to mark World AIDS Day in Kolkata December 1, 2014. The world has finally reached the beginning of the end of the AIDS pandemic that has infected and killed millions in the past 30 years, according to a leading campaign group fighting HIV. United Nations data show that in 2013, 35 million people were living with HIV, 2.1 million people were newly infected with the virus and some 1.5 million people died of AIDS. By far the greatest part of the HIV/AIDS burden is in sub-Saharan Africa.
  • Russian tourists in Antalya
  • Posters comparing lethal amounts of heroin, fentanyl, and carfentanil, are on display during a news conference about the dangers of fentanyl, at DEA Headquarters in Arlington, Tuesday, June 6, 2017.
  • Women sit with relatives infected with cholera at a hospital in the Red Sea port city of Hodeidah, Yemen May 14, 2017
  • Laboratory
  • Drugs
  • OxyContin pills are arranged for a photo at a pharmacy in Montpelier, Vt.
  • An analytical chemist shows a petri dish with salmonella in the Institute for Chemical and Veterinary Research in Stuttgart, southwestern Germany
  • Yemeni children walk amidst the rubble of a house in Yemen's Huthi rebel-held capital Sanaa on August 11, 2016.
  • US State Department
  • Yellow Fever
  • General view of the World Health Organization (WHO) headquarters in Geneva, Switzerland, February 1, 2016
  • Biohazard
  • Democratic presidential candidate, Sen. Bernie Sanders, I-Vt., speaks during a campaign stop on Sunday, March 13, 2016, at Ohio State University in Columbus, Ohio
  • The check-in counter at the Sheremetyevo International Airport
  • Mosquito bite
  • Fizzy drinks
  • Relatives weep as they bury a loved one suspected of dying from the Ebola virus at a new graveyard on the outskirts of Monrovia, Liberia, March 11, 2015