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Covid Is Changing. Our Data Haven't Kept Up

Residents wait in line to receive a Covid-19 test in Allston, Massachusetts, in January.

Residents wait in line to receive a Covid-19 test in Allston, Massachusetts, in January.

Photographer: Vanessa Leroy/Bloomberg

Here the latest from the pandemic.

Earlier this year, a few states made a little-noticed change in how they counted Covid-19. In their daily tallies of hospitalizations, New York and Massachusetts began to differentiate between people who were admitted because of the virus, and those who’d come in for something else but tested positive.