3 different family members and friends- all of whom are in the healthcare profession- told me they had reactions to part 2 of Moderna vaccine. All 3 reported being hit with a "wave of massive fatigue" lasting under 24 hours. 1 of the 3 also reported a low grade fever. 1 other family member reported a slight headache several hours after part 1 of Pfizer vaccine, which went away after taking a Tylenol.