• No credible source supports the claim that COVID-19 vaccines increase schizophrenia risk by 315 times compared with flu shots. The specific figure appears fabricated.

• Multiple peer-reviewed studies show the opposite relationship: COVID-19 vaccination is associated with a decreased risk of schizophrenia and related psychoses, not an increase.

• A large 2024 cohort study found that COVID-19 vaccination significantly reduced the risk of schizophrenia, with a hazard ratio of 0.231 (95% CI 0.164–0.326), meaning roughly a 77% lower risk compared with non-vaccination—not a 315-fold increase¹.

• Another large study examining short-term psychiatric adverse events after COVID-19 vaccination found the adjusted incidence rate ratio for perceptual disturbances and psychoses was 0.72 (95% CI 0.70–0.74), again indicating a reduced rate after vaccination².

• The claim misrepresents the scientific literature; existing evidence consistently shows COVID-19 vaccines do not cause schizophrenia and, in fact, are associated with reduced risk.

Overall validity: 0%

1. Psychiatric adverse events following COVID-19 vaccination
2. Short-term risk of psychiatric adverse events following COVID ...