At this time there are no generic influenza vaccines approved for use in the United States. The FDA controls and monitors the supply of flu vaccine that is available. Only certain companies are allowed to produce it, and they do so under their own brand names.
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Stacy Wiegman, PharmD, Pharmacy, answered
Better known as flu shots, influenza vaccines are made by various manufacturers and available under the manufacturer's brand name for the vaccine. Currently, there are no generic forms of influenza vaccines available in the U.S. The vaccine comes in two forms: a shot or a nose spray. The flu shot contains inactive viruses and is approved for people age 6 months and older. FluMist, the nasal spray flu vaccine, contains a live virus and is approved for healthy people aged 2 to 49. Flu vaccines are given before cold and flu season hits, around late October or early November.