epidemiology

Toby Talbot / AP

Last week, a rabid raccoon was found in Frick Park, making it the sixth animal to test positive for the disease in Allegheny County this year.

Matt Nemeth / 90.5 WESA

Rift Valley Fever is transmitted by mosquitoes, infecting people and livestock. This tropical disease so far has only been found in the Middle East and Africa, though the types of mosquitoes that carry Rift Valley are found around the globe. One of which, the Aedes, lives in North America.

National Institutes of Health

While at rest, the human heart pulses blood through the body about 50 to 100 times every minute. But organs and tissues need a constant flow of blood, so the arteries stretch in response to each pulse to create steady pressure within the blood vessels.

Toby Talbot / AP

President Trump recently declared the opioid crisis a national public health emergency. It’s still unclear how much funding, if any, is tied to that declaration, but whatever resources are marshaled will likely fund work done by people most commonly thought of as fighting on the front lines of the epidemic, like social workers, addiction counselors and physicians.