https://cen.acs.org/articles/92/i7/Tracking-Memories-Form.html
“I joke to people that we want to show the mouse a picture of a cat and see if the mRNA in its brain gets excited,” Singer says. “It’s a silly analogy, but the point is that we’d like to connect behavior to molecular events.”
So what I am hoping is that every one who took vaccines will start glowing soon. Gives a whole new meaning to "Glowies" !