Sign of ... something

I gave blood this week. You know how they give you that list of countries that have cautions related to them? -- don't donate if you were in the UK during these years, if you've been in these African countries, if you've received a transfusion or donor organ in this part of Europe?

Yeah, the U.S. is on that list now. (If you've been in Broward County, Florida, recently, you can only give blood IN Broward County, because of Zika.)

Do any of y'all find yourselves imagining telling things to historians or is it just me?