To compare and evaluate competitive viral fitness, the viral growth rate (g, a combined growth/decay parameter for viral production) of each virus in a competition as well as the growth rate difference (d) and ratio (r) of the two viruses are calculated with 95% confidence intervals. If a control experiment is included, a p-value is calculated testing whether its parameters are statistically different than those of the competition under examination. Please enter the sampled time points and the production of each competing virus (represented by cDNA copy number derived from culture supernatant, number of infected cells, etc.). Only data from exponential growth phase should be included