It mutated its way from affecting bats to affecting people. Fortunately, the vast, vast majority of mutations either do nothing or make things actively worse.

It mutated its way from affecting bats to affecting people. Fortunately, the vast, vast majority of mutations either do nothing or make things actively worse. https://qbrc.swmed.edu/projects/2019ncov_immuneviewer/ https://qbrc.swmed.edu/projects/2019ncov_immuneviewer/ That's the chain of mutations for SARS-Cov-2 they've seen so far.