Received the first dose of Moderna vaccine two weeks ago. About 3 hours later I developed a killer headache (I seldom have headaches). Went home, dozed off for a few hours, felt better. Next day the headache went away completely.
I have been sleeping more than usual. Normally I am a 5 to 6 hours per night sleeper, but now I am drifting off in the evenings for several hours, then up in the middle of the night, and another 3 or 4 hours sleep in the early AM hours.
Scheduled for the second dose on the 27th.
By the way, I tested negative for Covid prior to taking the vaccination. Apparently I made it through a full year, taking minimal precautions, and had no infection. Just part of that 99.7% survivability thing, I guess. Knock on wood. Fingers crossed. Keeping a close eye out for black cats. Avoiding cracks in the sidewalks. Maintaining a proper balance of dilute ethyl alcohol solution in my circulatory system, purely precautionary.