Could the number of cases involving 20-55 year olds be exacerbated by vaping?

Possibly : Any habit that uses the lungs as a pathway fro drugs to enter the circulation (vaping,smoking) traumatizes the lung tissue on a microscopic level.We would expect increased invasion by opportunist infections of any type in these persons.

COVID 19: More research is needed. However, a question that has been raised is whether vaping plays a part in the deaths of younger people. Anything that compromises the lung can impact resilience when fighting COVID 19.