Health officials warned anyone experiencing such symptoms to seek medical care and for doctors to report unexplained cases of hepatitis A to the health department.

Czech records indicated 22,247 deaths including 6,667 unexplained cases or suicides.

The unexplained cases include military jet interceptions, abductions, cattle mutilations, and physical landing trace evidence.

Were the finds filed away in the archives of unexplained anthropologico-archaeological cases and forgotten?

Physicians in New York soon realized that they had seen a number of similar, unexplained cases in the previous several years.

The vast majority of unexplained cases involve the apparitions of people who have suffered violent deaths.

"But we're talking about four essentially unexplained cases within a two-week period," Laurie said while inwardly groaning.

Even with AIDS, there was the handful of unexplained cases.

For doctors around the country who had been observing scores of unexplained bleeding-lung cases in infants, the new study may provide some clues.

The study showed that the prime suspect for previously unexplained cases of the disease was a black mold called Stachybotrys chartarum.