The FDA has approved a nasal spray flu vaccine for home use. Here's how it works, and when it will be available.

The US Food and Drug Administration on Friday approved the first flu vaccine that does not have to be administered by a health care provider, but it won’t be available in time for this respiratory virus season.

The Food and Drug Administration (FDA) has approved the first-ever influenza vaccine that can be administered at home. It’s a nasal spray vaccine called FluMist, and it’s been