Until 2020, few Americans needed to think about how viruses spread or how the human immune system works. The pandemic offered a painful crash course....
We asked 19 photographers to revisit their most enduring images of the coronavirus pandemic, five years after the virus became a global threat. Their photographs...
At the nation’s borders, federal workers keep the country safe in many ways: Some investigate sick passengers. Some examine animals for dangerous pathogens. And some...
