Bed Bugs and Plain English

An amusing article about bed bugs in hotels includes an unintentionally funny quote that illustrates the importance of using plain English in interviews. From Reuters via MSNBC:

Unlike mosquitoes, which can transmit malaria, yellow fever and West Nile virus, bed bugs have not been linked to anything more serious than the itchy, red welts that often appear on a victim’s skin. “There are no studies that have been done that show they vector anything,” said Bill Brogdon, an entomologist with the U.S. Centers for Disease Control and Prevention. “Hepatitis B has been specifically looked for and the studies have been negative so far.” [emphasis mine]

If you have any idea what this earnest scientist means by his use of "vector," please share it in a comment.