The study was published in the journal Psychological Science. Vaccines against the SARS-CoV-2 coronavirus are considered the most effective way to prevent severe forms of COVID-19. However, many people still fear the possible side effects of the vaccine.
The researchers analyzed data from 315 people, interviewing them before vaccination about their attitude towards the vaccine, trust in healthcare and scientists, and also conducting tests for certain personality traits. One day after vaccination, the researchers collected data on the presence and severity of any side effects.
No participant reported side effects requiring medical intervention. The most common side effects were fatigue, muscle pain, headache, and pain at the injection site. However, these occurred more often in people with a negative attitude towards vaccination.
Overall, psychological factors influenced the 30% probability of occurrence and severity of side effects.
The researchers emphasized how important it is to create a trusting atmosphere around COVID-19 vaccination, especially for older age groups, who more often exhibit a negative attitude towards the vaccine.