2019 Most Notable Disease Outbreaks

2019 Most Notable Disease Outbreaks

Here's a look at some of the most notable outbreaks that made headlines in 2019.


measles virus picture

In 2019, the U.S. experienced its worst measles outbreak in more than 25 years.

Measles is a highly contagious airborne infection causing fever, coughing, and rashes. It can be prevented with a two-dose vaccine. Worldwide, the number of cases for January 1 to July 31 this year tripled to 364,808 from 129,239 during the same period in 2018.

Dengue Fever

Feeding mosquito

Dengue, or hemorrhagic fever, is the world's most common mosquito-borne virus and infects an estimated 390 million people in more than 120 countries each year -- killing more than 25,000 of them, according to the WHO.

Hepatitis A and C

hepatitis virus

Hepatitis and the hepatitis viruses are distinct - some you may be familiar with, like Hepatitis A or Hepatitis C. However, globally, hepatitis is killing as many people as the human immunodeficiency virus (HIV) and the bacteria that cause tuberculosis.

Eastern equine encephalitis

Eastern equine encephalitis under TEM

Under a magnification of 83,900X, this digitally colorized transmission electron microscopic (TEM) image depicts a salivary gland tissue section that had been extracted from a mosquito, which was infected by the eastern equine encephalitis (EEE) virus. The viral particles have been colorized red. Credit: CDC

Eastern Equine Encephalitis is a rare and deadly mosquito-borne viral disease that has seen a dramatic increase in the United States this year. It gets its name because it was first seen in horses in Massachusetts. According to the CDC, 37 cases of the mosquito-borne illness have been confirmed across 9 states, with 15 deaths recorded.

Ebola Virus image

bola continues to be relentless in the Democratic Republic of the Congo. The outbreak was first declared in August 2018 and has affected more than 3300 individuals and led to more than 2000 deaths. The WHO says the Ebola outbreak remains an "urgent" global health emergency.

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