begin quote from:

 • Many counties that hosted Trump rallies had a significant increase in Covid-19 cases

Many counties that hosted Trump rallies had a significant increase in Covid-19 cases

By Nadia Kounang

Updated 10:25 PM ET, Thu October 29, 2020

How vulnerable to Covid-19 are supporters at Trump's rallies? 03:57

(CNN)A CNN investigation of 17 Trump campaign rallies finds that 14 of the host counties -- 82% of them -- had an increased rate of new Covid-19 cases one month after the rally.

The 17 rallies occurred between August 17 and September 26. CNN evaluated the rate of new daily cases per 100,000 residents at four weeks before the rally, on the rally date, and four weeks after the rally at the county level and at the state level.

Trump holds first entirely indoor rally in nearly three months

Of the 14 host counties that had increased infection rates, eight of the counties had declining rates of infection in the month before the rally. The other six counties already had increasing rates of infection in that preceding month.

CNN's analysis also found that in 10 counties, the new rates of infection were growing faster than the overall rate for the state.

Content by Adidas

ZX never felt so good

It’s hard to believe, but there was a time when work shoes were work shoes, sports shoes were sports shoes and leisure shoes were leisure shoes. Those lines were never crossed.

Some of the rallies that were surveyed included the Trump campaign's September 12 rally in Minden, Nevada.

Minnesota reports three Covid-19 outbreaks related to Trump campaign events in September

In the month before the rally, cases had begun to fall. But four weeks after the event, the rate of new cases in the county skyrocketed by 225%, outpacing the 74% increase the rest of the state experienced in the same time period.

CNN also looked at the September 18 rally in Bemidji, Minnesota and found that while rates of infection had already been increasing in the month prior to the rally, the rate of infection in the county one month later had jumped by more than 385% and was greater than the state's rate of infection.

Get CNN Health's weekly newsletter

Sign up here to get The Results Are In with Dr. Sanjay Gupta every Tuesday from the CNN Health team.

CNN's analysis evaluated rallies in Minnesota, Wisconsin, Arizona, Pennsylvania, New Hampshire, North Carolina, Michigan, Nevada, Wisconsin, Minnesota, North Carolina, Ohio, and Florida.