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 announced Friday it had broadened the approval of the FluMist nasal spray to become the first "self-administered" influenza vaccine — though a delay in the change means the vaccine will not be available to ship to homes until next year's flu season at the earliest.