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Post-Vaccination Syndrome

covid vaccine

Ari Kustiawan from Getty Images/CanvaPro

A small study led by Yale University is investigating people with COVID-19 post-vaccination syndrome (PVS). While COVID-19 vaccines likely prevented millions of deaths, a small number of those vaccinated have developed long-term health issues, including fatigue, exercise intolerance, brain fog, tinnitus and dizziness. The researchers compared blood samples from 42 people with PVS and 22 healthy individuals without it, as well as 134 people with and without long COVID, a chronic condition present for at least three months after a COVID-19 infection with a range of symptoms that may include fatigue, shortness of breath, brain fog, heart palpitations, dizziness, joint pain and muscle aches.

The researchers discovered that those with PVS have distinct proportions of immune cells, but these differences have yet to be directly linked to their symptoms. Both PVS and long COVID patients experienced a reawakening of the Epstein-Barr virus linked to mononucleosis and multiple sclerosis. The PVS patients had higher levels of a coronavirus protein in their blood compared to patients with long COVID. Although the study has not definitively determined what makes these people sick, the findings suggests that further research is warranted.

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