An image from an electron microscope of Treponema pallidum, the bacteria that causes syphilis. In 2022, the number of reported cases of syphilis in the United States was the highest it has been since ...

Congenital syphilis has become more than ten times as common over the past decade, the C.D.C. reported. “The situation is dire,” said one expert. By Apoorva Mandavilli See more of our coverage in your ...