AstraZeneca has just scored big on the quest to make routine vaccinations less of a hassle. | The FDA signed off on AstraZeneca's influenza vaccine FluMist for self-administration by adults up to 49 years old and for administration by a parent or caregiver in kids between the ages of 2 and 17.

The U.S. Food and Drug Administration said on Friday it has approved AstraZeneca's nasal spray flu vaccine for self-administration, making it the first of its kind.

It's a "new option for receiving a safe and effective seasonal influenza vaccine potentially with greater convenience, flexibility and accessibility for individuals and families," said Dr. Peter Marks,