Once concrete methods were developed, human tests began in the late 1990s.

The company has applied for Federal approval to begin human tests, but it would not predict when that might occur.

Altogether, the company has 78 drugs in human tests.

The company said that it would soon start large human tests of LAF237.

Mr. Johnson said last month that the agency had looked at human tests from the industry in three or four recent cases.

Yet other researchers have held back from human tests, in part because the theory seems so bizarre.

The panel concluded that human tests could be done only if there were a compelling public health need.

The study marked the first human test of the antimalarial drug primaquine.

He said a vaccine might be ready for human tests in two years.

The body language continues to be mulled like a human Rorschach test.