A continuing public misconception about donating blood may explain in part why shortages often exist in blood banks across the nation.

According to a survey by the American Association of Blood Banks, about one in five Americans still has a fear of contracting AIDS by donating blood.The association notes, however, that it is not possible to get aids by donating blood since in America only new and sterile needles are used in blood donation.

The organization also reports there is no recorded case of AIDS, or any other sexually transmitted disease, ever having been transmitted by giving blood in the United States.