The federal program is providing two types of vaccine: monovalent, which offers protection only against swine flu, and bivalent, which also contains vaccine against last year's .
In other countries, such as Yemen, Egypt and India, the immunization program is getting a boost from a so-called monovalent vaccine, which more effectively knocks out the Type 1 .
Because today many people are discovering "that a single story, a monovalent logic, a rigid theology are not adequate.
Margaret Chan in US Department of State (press release) For a trivalent pandemic vaccine [containing three different strains of vaccine], annual manufacturing capacity is about 500 million doses,Chan said. "For a monovalent vaccine [containing one strain], this figure increases to 1.5 billion...