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One age group is responsible for nearly half of new cases of COVID-19, study shows
Korin Miller
February 2, 2021·5 min read
For months, public health officials have said that younger adults have been big drivers of the spread of COVID-19 in the U.S. But new research suggests there’s another age group that may be fueling new cases of the virus: people ages 35 to 49.
That’s the conclusion of a just-released study from the U.K.’s Imperial College London. The study, which was published in the journal Science, analyzed mobility data from the cellphones of more than 10 million Americans between early February and late October 2020. Among other things, the data helped researchers determine where people went, like restaurants and grocery stores. The researchers then compared that data to COVID-19 case and mortality rates by age.
The researchers concluded in the study that the “majority of COVID-19 infections” originate from people between the ages of 20 and 49, but people between 35 and 49 were responsible for 41.1 percent of new cases of the virus. Those in their late thirties and forties driving the spread of the virus was consistent across the country, the researchers said in the study, but “estimated contributions” of people between 20 and 34 were higher in the Southern, Southwestern and Western regions of the United States.
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