Vaxxed people are getting sick because the unvaxxed can cause breakthrough infections,

Now, riddle me the following. Why are those who get more seriously ill and those who take up hospital space overwhelmingly the unvaxxed?

You COULD Google that last sentence and come back and share the answer, if it differs from that sentence.

Please do it before you go clubbing again.

By the way, does the club say admission for unvaxxed only?