New research shows that fears of [COVID shot] side effects may actually make side effects more likely. … 22,000 participants who received the vaccines and more than 22,000 who received a placebo shot. After the first shot, systemic side effects -- symptoms that affect the entire body, such as fever, headache and fatigue -- were reported by about 46% of vaccine recipients. But more than 35% of people who got the placebo shot also experienced similar side effects…