Seven months later, what we know — and don't know — about Covid-19

Seven months later, what we know — and don't know — about Covid-19

Seven months later, what we know about Covid-19 — and the pressing questions that remain

By ANDREW JOSEPH AND HELEN BRANSWELL AND ELIZABETH COONEY

ALEX HOGAN/STAT

Here are some of the things we have learned about Covid-19, and some of the pressing questions that we still need answered.

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