2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/7892I examine the status of inflationary cosmology in light of the first-year data from the WMAP satellite, focusing on the simplest models of inflation: those driven by a single scalar field. The WMAP observation of the Cosmic Microwave Background is the first unified, self-consistent data set capable of putting meaningful constraints on the inflationary parameter space. WMAP provides significant support for the inflationary paradigm in general, and single-field slow-roll inflation models provide a good fit to existing observational constraints.8 pages, 4 figures. To appear in the proceedings of the XXXIXth Rencontres de Moriond "Exploring the Universe"Astrophysicstext