It was 100% because of his story.
The 2019 original thread.
https://www.canesinsight.com/threads/a-%E2%80%9C-shingles%E2%80%9D-weekend-omg.147080/
The 2020 post that reminded me to get it.
https://www.canesinsight.com/threads/do-you-typically-get-the-flu-vaccination.159239/post-4594560