That appears to be changing. There’s a big uptick in younger people getting the virus but it appears to be less severe.
“After Arizona’s reopening, younger people make up greater share of COVID-19 cases”
https://www.azcentral.com/story/news/local/arizona-health/2020/06/24/more-younger-people-getting-covid-19-since-stay-home-order-ended/3246845001/
“Surge in coronavirus cases linked to more Texans in their 20s getting sick, officials say”https://www.texastribune.org/2020/06/16/texas-coronavirus-spike-young-adults/
I didn’t say that young people weren’t getting infected, but that they didn’t seem be affected by it too much. They have good immune systems.