A fortnight later a farmer reached the hospital spewing vomito negro—once a recognized sign of yellow jack. He also died, and within a month two more men died the same way. Like most present-day ...

a Calico Jack Rackham pirate flag and a Yellow Jack. The Yellow Jack is a signal flag that historically indicated a vessel was or, might be, harboring a dangerous disease. A row of colorful book ...

Jim Writer, author, Yellow Jack: How Yellow Fever Ravaged America and Walter Reed Discovered Its Deadly Scourge There is no cure for yellow fever. Before the transmission of yellow fever was ...