Scientific models can’t predict the future, but they can give a pretty good idea of what it might look like. The most optimistic ones say Bay Area coronavirus deaths will peak this week, while the ones used by state officials say it will be a bit longer. How does this affect soon-to-be released plans to start a return to normalcy? Erin Allday discusses the science of disease modeling. | Get unlimited Chronicle access: sfchronicle.com/pod

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