Comparative randomized, single dose, two-way crossover open-label study to determine the bioequivalence of Oseltamivir from Oseltamivir 75 mg capsules (Pharmacare PLC, Palestine) and Tamiflu® 75 mg capsules (Hoffmann-La Roche, Switzerland under license Gilead Sciences ,California ,USA after a single oral dose administration of each to healthy adults under fasting conditions.