X and Gilead Sciences Inc (GILD.O), and GlaxoSmithKline's (GSK.L) (GSK.N) and Biota's (BTA.AX) Relenza, an inhaled
drug, can treat influenza if given quickly. They have been shown to work against this new flu strain.
Gibbs said Obama, who recently returned from a trip to Mexico, had shown no symptoms of the virus and had therefore not been tested. (Additional reporting by Kim Dixon, Donna Smith and Maggie Fox; editing by Eric Beech)