The promise of profits has attracted new players into the business. Some of the world's largest drugmakers, who in the past avoided the vaccine market because of its limited scope -- its not easy to convince healthy adults to get a shot for measles -- are now jumping into the fray.
Last month alone saw three large vaccine deals. Abbott Labs bought a Belgian drug business, along with its flu vaccine facilities, for $6.6 billion. Johnson & Johnson invested $444 million in a Dutch biotech firm that makes and develops flu vaccines. Merck, which already makes vaccines for shingles and other diseases, struck a deal to distribute flu shots made by Australian CSL.
Smaller biotechs are also angling for a slice of the action, making vaccines one of the fastest-growing areas of research in the biotech industry.
Large and small drugmakers are drawn to the business largely because of scientific advances that promise to radically expand the range of health problems that vaccines can address. In addition to preventing childhood diseases such as measles and polio, vaccines can now also ward off cervical cancer, and researchers are working on vaccines for HIV and tuberculosis.
Scientists believe they can create therapeutic vaccines than treat diseases such as Alzheimers and diabetes after they have set in. (At least one company is betting on a vaccine that helps cigarette smokers quit.)
"These innovations broaden the market potential for vaccine makers and partly explained the renewed interest by drugmakers," says Anthony Cox, a professor at Indiana University's Kelley School of Business who specializes in the marketing of medical products.
But Mark Grayson, a spokesperson for the Pharmaceutical Research and Manufacturers of America, which represents the country's leading pharmaceutical research and biotechnology companies, says that drugmakers are also compelled by the government to join efforts to ensure that there is enough vaccine to go around.
"Because of national security implications, the government felt that they needed to encourage and ask [vaccine manufacturers] to move much quicker," he says. Grayson adds that vaccine manufacturers also face significant costs; aside from the expense of fitting a new vaccine into a tight production schedule, drugmakers GlaxoSmithKline and Sanofi Pasteur were forced to acquire new vaccine production facilities in recent years to keep up with demand.
While this promise of new treatments for painful diseases brings hope to many, vaccines continue to attract critics. The National Vaccine Information Center, a non-profit advocacy group, is at the forefront of a movement demanding that vaccines be tested more thoroughly before hitting the market. Although there has been little evidence to support their claim, detractors -- including the comedian Jim Carrey -- believe that vaccines are at least partly to blame for the sharp rise in autism in recent decades.
The swine flu vaccine has also attracted its share of critics. Frank Lipman, a New York-based doctor who specializes in a mix of Western and alternative medicine, points out that the swine flu is rarely fatal and that it's too early to tell if it's safe because it hasn't been widely tested.