How can nations prevent more pandemics like COVID-19? One priority is reducing the risk of diseases’ jumping from animals to humans. And that means understanding how human actions fuel that risk.

Researchers have a way to scope out areas that may be suitable for the invasive Aedes scapularis, a mosquito capable of transmitting yellow fever virus.

The US response to the coronavirus was slow and problematic, but it also was rooted in a 19th-century way of viewing public health.

Yellow fever, malaria and Ebola all spilled over from animals to humans at the edges of tropical forests. The new coronavirus is the latest zoonosis.

A 19th-century outbreak of yellow fever in New Orleans created an elite class while it also "exacted a devastating social cost for large swaths of society."

Places where tropical diseases are now unknown—Canada and parts of Northern Europe, for instance—are due to become prime real estate for mosquitoes.