Buruli ulcers have been reported across the globe in over 30 countries.

What do these dozens of countries have in common? They’re all home to tropical, subtropical, and temperate climates. Of those many countries, most of the reported cases occur in sub-Saharan Africa. But, it’s not Africa that has a long history with Buruli ulcers. From scientists to the local government, Australia has been dealing with this disease for years.

According to the WHO, the disease belongs to the same family of bacteria that causes tuberculosis and leprosy. The bacteria typically affects a person’s legs or arms. Caused by Mycobacterium ulcerans, cases of Buruli ulcers are reaching an epidemic level in Australia right now.

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The recent E. coli outbreak, which recently spread across the United States, has brought up a lot of questions, both about this specific incident and others like it.

How many people are affected?

As of May 2, 2018, over 100 people are reported sick with the current total standing at 121. There has been one death and 52 hospitalizations so far.

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It’s pretty likely that you know a person with a peanut allergy.

About .5 to 1 percent of people are allergic to the food, making it one of the most common food allergies. To make things worse, those numbers appear to be growing. The number of individuals who are allergic to peanuts is increasing, especially in recent years. While it’s unfortunate that these people miss out on a beloved food, the allergy can be quite dangerous too. Peanuts and related products create one of the most severe reactions for food allergies.

Thankfully, research for a peanut allergy vaccine is underway.

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Nearly 2.8 million people from yellow fever endemic countries flew to the United States in 2016. Such a large amount of foreign visitors can create an issue if there’s no requirement for yellow fever vaccine certificates.

Many cities in the U.S. are now realizing this problem could be the source of future yellow fever outbreaks.

The mosquito-borne illness is normally found in tropical and subtropical areas of Africa and South America. The virus only reaches U.S. travelers in extremely rare cases. Out of roughly 200,000 yellow fever cases per year worldwide, 90 percent are in Africa.

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Venezuela is currently in the middle of a tremendous malaria crisis with case amounts five times higher than they were in 2013.

Numbers have been growing rapidly over the years. In 2017, the country had approximately 406,000 cases of malaria, which is up almost 70 percent from 2016. That year alone had a rise of approximately 76 percent of cases from 2015.

The spike’s cause cannot be traced to one sole factor, though officials cite falling malaria education and prevention efforts as a primary force.

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