Two-thirds of COVID-19 jab reactions caused by placebo effect - study The Jerusalem PostNocebo responses explain up to 76% of COVID vaccine side effects Ars TechnicaNew study shows more than half of vaccine-induced side effects are all in your head WISHTV.comMost side effects noted in COVID vaccine trials may be due to 'nocebo effect' CIDRAPStudy: 'Nocebo effect' may be behind most mild COVID vaccine reactions Spectrum News NY1View Full Coverage on Google News