The F.D.A. authorized AstraZeneca’s treatment to be given outside a health care setting, although it will still need a prescription.

To combat this, the U.S. Food and Drug Administration (FDA) has recently approved the FluMist nasal spray as the first influenza vaccine that can be self-administered at home. This innovative approach provides greater convenience,

The Food and Drug Administration on Friday approved the first at-home flu vaccine, a nasal spray that consumers with a prescription will be able to order online starting next year. Health experts say the convenience of the spray — FluMist — could lead to increased flu vaccination rates.