[PHI 2200] It's not personal, it's strictly business

In Hunting the Nightmare Bacteria, Frontline reports that pharmaceutical companies are not investing in developing new antibiotics at a time when bacteria that are resistant to antibiotics are spreading fast and are estimated to be responsible for more deaths per year than AIDS.

For example, Dr. Charles Knirsch, Pfizer’s vice president of clinical research, explains his company's decision thus:

Do pharmaceutical companies have to do only what their investors require of them? Or do they have a moral duty to invest in antibiotics research, even if antibiotics do not bring as much profit as other kinds of drugs, such as cholesterol drugs and psychiatric drugs, in order to save lives?