Two-thirds of systemic adverse reactions to coronavirus vaccines can be explained by the nocebo effect – self-hypnosis, or the expectation of negative consequences. This was stated by American scientists in a study published in the journal Jama Network Open.
The experts analyzed 12 scientific papers, including data on 45,380 vaccinated people. It is noted that the subjects in the studies were divided into two groups: one received a real drug, and the other a placebo (dummy).
According to scientists, following the first dose of placebo, 35% of the subjects complained of fatigue and headache. After the second dose – 32%. In the groups that received the real drug, 46% of those vaccinated with the first dose and 61% with the second dose complained of a deterioration in health.
Thus, the scientists concluded that regarding 76% of adverse reactions following the first dose and regarding 52% following the second can be explained by the nocebo effect.
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