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Influence of relative transmission ability and immune escape on the competitive outcome of strains. (a), (b), and (c) show the final size of strain 2 at 10%, 50%, and 90% of the immune escape capacity, respectively. The color bar is around 0%, i.e., the purple area indicates that strain 2 will not outbreak, which means that the winner of the competition between strains is strain 1. The other areas indicate that strain 2 is the winner of the competition between strains.
