(As Cleopatra once quipped.) I've been stuck four times with the Pfizer SARS-2-CoV vaccine with little trouble. But for the last two days, wondered why I felt like a freight train ran me over. Turns out it was Shingrix (shingles) Dose #2. The first shot was no biggie but this one put my immune system in "lock down the hatches" mode. Yesterday, I kept taking to my bed. Today my energy is better but not where it usually is. Still, I'm certain a couple of days of weirdness is preferable to a couple of weeks of dermal torture!