How the Coronavirus Attacks the Human Body — and How the Body Fights Back

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A look at what happens inside the human body once it's infected with COVID-19. Plus, a global study suggests the quality of a country's health system and government response can be linked to the coronavirus' death toll; the CDC says household gatherings are contributing to the surge in virus cases; and as the number of infections rise, the U.S. doesn't have enough contact tracers.

How the Coronavirus Attacks the Human Body — and How the Body Fights Back