Flu Vaccine Efficiency in California

Counties distribute flu vaccines each year, but not all of them are used up. In the map below, there's a bubble for each California county. The larger the bubble, the more yearly vaccines the county receives on average (2008-2012). The darker the color, the more is left unused each year.

Take a look at places like Alameda County, where efficiency is very high and volume is very high. But many places, including some large counties like Orange County, leave much of their vaccines on the table at the end of the year.

Notes: Three cities distribute vaccines separately from their county and weren't included in the map: Long Beach, Berkeley and Pasadena. The map represents how many doses of flu vaccine were given to the county for 6 flu seasons from 2009 to 2014, and the total percentage that was reported unused in that time.