National numbers, Nov. 22

1 in every 114 Americans has been diagnosed with COVID-19 since the beginning of November, and cases aren’t slowing anywhere in the nation. The COVID Exit Strategy tracker categorizes the spread in every state except for Maine and Hawaii as “uncontrolled”; even Vermont, praised by public health experts for its mitigation efforts, is now seeing record numbers.

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How to think about vaccine results

Pfizer reported its preliminary data not in a peer-reviewed scientific paper, but in a press release, and some key details about the company’s clinical trial are not yet public. I used information from STAT News, KHN, and SciLine to compile a few key questions that should be in all of our minds as we think about this and future vaccine data releases.

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A new metric for conceptualizing cases

Last week, a new metric appeared in the COVID Tracking Project’s daily updates. Here’s how it works. You take the number of COVID-19 cases reported in the past week and divide the current U.S. population by that case number. There are variations; the metric may also be calculated for different time spans or smaller geographies, such as a specific U.S. state. But the standard calculation focuses on the nation, over the past week.

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COVID source callout: Missouri

Missouri presents its race and ethnicity data in pie charts, showing the percents of cases and deaths that are reported in each category. A lot of states use this type of pie chart presentation, as it draws attention to the most impacted groups. But pie charts have a significant drawback.

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