Last evening, I got my second dose for COVID-19. I didn't have any side effects except for muscle pain until I went to bed. At 3 am, I woke up because I had chills, but I didn't have a fever. Then I slept but woke up again at 6 am because I had fatigue and fever. I took medicine and got better after a while. If I have to get vaccinated every year, it will be tough.