I haven’t gotten one of those since I was a kid. A few years ago I found out the 2009 flu shot was [delayed](https://web.archive.org/web/20120910013925/https://www.theglobeandmail.com/news/british-columbia/bc-to-delay-seasonal-flu-shots/article4287004/) because the people who got the previous year’s shot were more likely to get swine flu. That showed me they don’t know what they’re doing. I have avoided them since.