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

The FDA has approved a new nasal flu vaccine for home use, offering a convenient flu vaccination option. Here is a short guide on knowing treatment methods for managing flu symptoms effectively.

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.