The authors compared blood tests of people diagnosed with persistent dysautonomia and chronic fatigue syndrome after vaccination to healthy controls.

A new study may have finally found biological proof of post-COVID vaccine syndrome.

The German study, led by Dr. Fritz Boege, professor of clinical chemistry and laboratory medicine at the University Hospital of Düsseldorf, showed that people who developed persistent symptoms for up to five months post-vaccination have different immune protein levels than vaccinated, asymptomatic people.

Post-COVID vaccine syndrome, abbreviated as PACVS in the study, describes symptoms that can persist for months to years after the individual received the COVID-19 vaccine. Common symptoms include fatigue, brain fog, and post-exertional malaise, and abnormalities of the heart, nervous system, muscles, and the gut.