The U.S. move to screen travelers from three West African countries at five airports for signs of Ebola has drawn the usual share of controversy. Is it sufficient as a preventive measure? Or is it an overreaction? Some see it as a PR tactic aimed at preempting criticism that the Obama Administration did not do enough should the epidemic worsen. Others see it as the best the government could have done under the circumstances. The decision to screen air travelers was announced in the wake of other significant news: Liberian national Thomas Eric Duncan died of Ebola last Wednesday at a Texas hospital, three weeks after landing in the U.S. “To a large degree, this is a public relations issue. If you look at the … actuarial risk associated with this, it is not really that high,”said Wharton marketing professor Robert Meyer , who is also co-director of Wharton’s Risk Management and Decision Processes Center . “It certainly is a Band-Aid fix.…