Does Public Policy Deter Vaccine Research?

From cantonrep.com (free registration required):

"American drug and biotech companies should be burning the midnight oil working on vaccines to prevent ... diseases, but flawed public policy has discouraged vaccine development to the point that supplies of lifesaving vaccines are in jeopardy.

The fundamental problem is that government policies discourage companies from investing aggressively to develop new vaccines. Producers have abandoned the field in droves, leaving only four major producers and a few dozen products.

As a result, the United States has experienced dangerous shortages of several essential vaccines, and some school systems have been forced to waive immunization requirements."