National numbers, August 8

Delta continues to dominate COVID-19 cases in the U.S. The CDC updated its variant estimates this week, reporting that Delta made up 93% of U.S. cases at the end of July. It’s driving rising cases, hospitalizations, and deaths.

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National numbers, August 1

Not only is the Delta variant driving a case rise, it’s driving an exponential case rise. This week, about 466,000 new COVID-19 cases were reported; that number is more than five times higher than what we saw during the week ending July 2.

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National numbers, July 18

Cases have been rising for a couple of weeks now, but we’re now seeing the sharpest increase since fall 2020. Between July 9 and July 16, we went from an average of 15,000 new cases a day to an average of 26,000 new cases a day.

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National numbers, July 11

The Delta variant is now officially causing more than half of new cases in the U.S., per the CDC’s Nowcast estimates. This super-transmissible variant has contributed to rising cases in under-vaccinated parts of the country.

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National numbers, July 4

This is the first week since April that we’ve seen new COVID-19 case numbers go up in the U.S. It’s nominally a small bump—about 7,300 more cases than last week—but represents a 9% increase, and may be the beginning of a summer surge. (Even if we see a dip in the numbers this week due to the July 4 holiday.)

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National numbers, June 27

Cases have continued to plateau this week, with less than a 5% drop in the daily average. As I’ve said in previous weeks, this is partially due to slowing vaccinations—the White House admitted last week that the U.S. won’t meet Biden’s July 4 goal—and partially due to the Delta variant, which now causes at least 20% of new cases in the country.

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National numbers, June 20

The CDC updated its variant prevalence estimates this week, reporting that the Delta variant makes up 10% of U.S. cases as of June 5. This aligns with other estimates I cited last week, and suggests that the variant is spreading here at a truly rapid pace—its prevalence multiplied by four times in two weeks, according to CDC data.

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National numbers, June 13

After several weeks of sharp declines, new COVID-19 cases in the U.S. now appear to be in a plateau. There are a few factors likely influencing this shift: the aftermath of a reporting lag over Memorial Day weekend, the slow pace of vaccinations, and the rise of the Delta variant.

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National numbers, June 6

Cases continued to fall this week, with a seven-day average now under 20,000 new cases a day. This is basically the lowest number we’ve seen in the U.S. since spring 2020—though it’s important to note that the U.S. was doing minimal testing at that time, so the true case numbers in March 2020 were likely much higher than what was reported.

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