  The incorporation of bulk viscosity process to General Relativity leads to
the appearance of nonsingular backgrounds that, at early and late times, depict
an accelerated universe. These backgrounds could be analytically calculated and
mimicked, in the context of General Relativity, by a single scalar field whose
potential could also be obtained analytically. We will show that, we can build
viable backgrounds that, at early times, depict an inflationary universe
leading to a power spectrum of cosmological perturbations which match with
current observational data, and after leaving the inflationary phase, the
universe suffers a phase transition needed to explain the reheating of the
universe via gravitational particle production, and finally, at late times, it
enters into the de Sitter phase that can explain the current cosmic
acceleration.
