For those who suffered side effects following COVID vaccination, the adverse symptoms were likely well worth it — even if they didn’t really have to experience them. According to the US Centers for Disease Control and Prevention, some 77% of those who received a dose of either vaccine from Pfizer, Moderna or Johnson & Johnson reported at least one non-local symptom soon after the jab, such as headache, fever, fatigue and muscle pain. But a new study published in the journal JAMA Network Open on Tuesday has revealed that nearly two-thirds of those symptoms were likely self-induced via what researchers...