found that among more than 3,200 adults ages 18 to 34 who were hospitalized with the disease, 21 percent required intensive care, 10 percent required mechanical ventilation and nearly 3 percent died.
That is still vastly a higher number than the original number of infections. Only a relatively small number of 18-34 year olds end up in the hospital, so the the 3% would vastly overestimate the percentage in terms of the context of total infections for that group. And that is not even accounting for asymptomatic infections. Just trying to keep it a little more accurate.