It was a myth growing up. Blood attracts sharks, but piss will keep them away. So don’t try this at home… primarily because you probably don’t have shark at home.
Is this jacket or a shirt/dress? If it’s a jacket, You can take it off and put it through x-rays. If it’s a shirt/dress, I’m not sure of the consequences of walking through security naked or in your underwear…
I was having trouble with the same. In this context, IRA refers to “Inflation reduction act”