New study confirms vaccinated healthcare workers never infected with COVID still developed long COVID symptoms, raising questions as to whether the jab is to blame for the chronic condition.

A new peer-reviewed study has confirmed that vaccinated individuals who were never infected with COVID-19 are developing the same neurological and psychiatric symptoms blamed on "long COVID," raising serious questions about whether the vaccine—not the purported virus—is the underlying cause.

Long COVID is characterized as a chronic condition that emerges after an infection with SARS-CoV-2, the pathogen said to cause COVID-19.

But the new study shows this chronic condition occurs in those who were never infected, but who were vaccinated.

Published June 23, 2025 in the Journal of Microbiology, Immunology and Infection, the study evaluated 467 healthcare workers (HCWs) from a teaching hospital in northern Taiwan.

Of the 467 individuals, 222 had no record of positive COVID infection.