In retrospect, I suppose that going for a 50-kilometre bike ride wasn't the best idea after having received my second vaccination against COVID-19, and yet, on the road I went. I mean, after my first jab, in which I received the AstraZenica vaccine, I managed to get some chores done around the house, go for a 30-km ride, and grill up some dinner before the side effects kicked in, before the chills, aches, and headache hit me like a ton of bricks and had me in bed from a Saturday night to Monday morning. When I received my second dose on Saturday—this time, the Pfizer mRNA vaccine—a woman who was in the waiting area, after the dose, told me that her husband had also received mixed doses and had reacted badly, several hours later. Hearing that, I wanted to get my ride in, lest I be unable to do it later. I was almost 20 percent into my Icelandic virtual Ring Road challenge , and I wanted to log enough distance that, should the vaccine take me out of action for a day or two, I would s...