This article goes into it: https://www.wsws.org/en/articles/2024/02/20/svfl-f20.html

However, among young working adults (18 to 44 years of age), he noted, excess death from disease remains high, with nearly 12,500 more deaths in 2023 than the pre-pandemic normal. In particular, this group had the highest rate of excess deaths of any age group in 2021. More than 75,000 excess deaths occurred in that year among young adults, who were told they had to return to work despite many not being vaccinated and having to face the brunt of the ongoing waves of infection. Astounded by the figures, Travis bluntly noted that young adults shouldn’t be dying at this rate.

One point that Travis wanted to emphasize is the class character of these deaths. He emphasized that while the demographic of 18 to 44 represents the “blue collar” workers who are constantly exposed through their work to the virus, the percent of excess deaths among those that are 45 to 75 years of age has declined almost to baseline. Travis calls this demographic more representative of “the managerial class,” such as “factory superintendents, upper-level corporate management, newspaper editors, the publishers of fancy magazines like New Yorker and The Atlantic, as well as healthcare administrators and tenured academics. For them, indeed, the pandemic is over.”

Travis then highlighted the overall excess deaths in the US by year of the pandemic, comparing it to the baseline period before the pandemic bracketed by various age groups. What becomes readily apparent is the sustained massive loss of life that had such a devastating toll on older people. Even in 2023, though the estimates remain to be finalized due to delays in reporting deaths, deaths are still more than 200,000 above the baseline from 2019.