What prevents a pharmaceutical type company from creating the H1N1 Swine flu in a lab to sell a cure later?

Dawn asked:


While H5N1 doesn’t easily infect people, H3N2 viruses do. If someone exposed to a mixture of the two had been simultaneously infected with both strains, he or she could have served as an incubator for a hybrid virus able to transmit easily to and among people.

That mixing process, called reassortment, is one of two ways pandemic viruses are created.

So who is monitoring these people to avoid contaminating people as a means of making money off of it later?

Symptoms of H1N1