It will, but age has less to do with it than previously thought.
A significant percentage of youngsters who catch 19 need medical care to get them through it. The need to provide medical care to 20% of infected people is what this lockdown is all about. Without medical care, a 2% zap rate becomes 20%. Italy is just turning people away from hospitals, because they have no room. Their zap rate is close to 9% substantially because they can only provide medical care to about 9% of infected, instead of 20%.
Many youngsters need medical care too. The medical care thing is not an elderly only phenomenon. The difference is that a 20 year old who receives care will almost certainly survive, while an 85 year old who receives care may only have a 85% chance.