Here is some good advice about the vaccine:
Is the Second Dose Bad? If I Feel OK, Is It Working? Can I Take Tylenol?
It's not exactly related . . . Okay, it isn't related at all . . . but now that we have answered those questions, you may have other questions about cicada brood X, now coming out of the ground. See:
Bonus question: Why do cicadas come out in prime numbers of years? Anyone??? (Answer: to avoid predators. Look it up.)