The problem with making a killing from covid

It worked, we created a brand new business from creating and selling vaccines, and we made a killing.

Now, covid appears to be on the way out, at least in the countries who could pay top dollar for protection, profit is starting to wane.

What next, how long will we need to wait for another virus gravy train to come along?

Did someone say they can make these things in a lab?

What are we waiting for?