NEW ORLEANS (AP) — Ebola fears have infected a medical conference on the subject. Louisiana state health officials told thousands of doctors planning to attend a tropical diseases meeting this weekend in New Orleans to stay away if they have been to certain African countries or have had contact with an Ebola patient in the last 21 days. The order came in a letter Wednesday to the American Society of Tropical Medicine and Hygiene, which made clear it did not agree with the decision.