Outbreak Tracker

Welcome to the Outbreak Tracker, brought to you by Healio.com and Infectious Disease News. Here you'll find the latest data on emerging outbreaks affecting countries worldwide, including case counts, mortality rates and transmission and treatment information. Check back daily to stay informed.



  • Zika (Americas)

    • Credit: CDC
  • Updated: 3/21/2018 5:42 PM
  • Origin: Brazil (2015)
  • Deaths: 20
  • Cases: 223,477 (583,451 suspected)

Full story: CDC updates Zika testing guidance following decline in disease prevalence

  • MERS

  • Updated: 4/06/2018 2:27 PM
  • Origin: Saudi Arabia (2012)
  • Deaths: 750
  • Cases: 2,144

Full story: MERS-CoV: Waiting for Godot for answers

  • Chikungunya

  • Updated: 3/21/2018 5:40 PM
  • Origin: St. Martin (2013)
  • Deaths: 541
  • Cases: 338,963 (2,225,014 suspected)

Full story: Chikungunya more prevalent in women

  • Candida auris (United States)

    • Candida auris
  • Updated: 4/06/2018 2:15 PM
  • Origin: Japan (2009)
  • Deaths: 0
  • Cases: 233 confirmed (28 probable)

Full story: VIDEO: C. auris ‘in the category of a superbug’

  • Hepatitis A

    • Microscopic image of hepatitis particles
  • Updated: 4/06/2018 2:26 PM
  • Origin: San Diego (2016)
  • Deaths: 21
  • Cases: 703

Full story: California declares state of emergency over hepatitis A outbreak

  • Lassa fever

    • Microscopic image of Lassa fever particles.
  • Updated: 4/06/2018 2:24 PM
  • Origin: Nigeria (2017)
  • Deaths: 104
  • Cases: 1,613

Full story: Nigeria’s Lassa fever outbreak involves ‘concerning’ number of cases