Last night I was chatting online with a friend, and learned they had just come down with Shingles. I think it is Chicken Pox’s older cousin, a part of the Cooties family. Chatting through Microsoft Communicator, not through a browser, on my work laptop.
Today, I go upstairs to check the scores on my personal PC, open up Chrome, and am blasted with “Now’s the time, before it’s too late, to get your Shingles’ shot” sidebar adds. 
Within 12 hours of communicating on a separate computer, separate chat program, about a friend’s cooties, I have been targeted with adds. Apparently, Shingles is more contagious than one may initially assume, given the rate it seems to spread online.