Study of Relative Bioavailability of Nirmatrelvir and Ritonavir as 4 Different Fixed Dose Combination Tablet Formulations Relative to the Commercial Tablet Formulation.  A Phase 1, Open-Label, Randomized, Single Dose, Crossover Study to Estimate the Relative Bioavailability of Nirmatrelvir and Ritonavir Following Oral Administration of 4 Different Fixed Dose Combination Tablet Formulations Relative to the Commercial Tablet Formulation in Healthy Adult Participants Under Fasted
Condition.