When infected with the coronavirus, people produce an inflammatory protein called interferon gamma (or IFN-y), which is part of the body’s natural response to fight off infection.
The production of the protein typically stops once infection goes away, but researchers discovered participants with ongoing Covid symptoms had high levels of IFN-y for up to 31 months after initial infection, which the researchers believe may be the cause of long Covid.
Over 60% of patients experienced relief from at least some of their symptoms during the study period, and participants who were vaccinated after infection saw significant decreases in their long Covid symptoms and IFN-y production, suggesting vaccination “improved” long Covid symptoms, according to the study.
Current long Covid treatment only targets symptom alleviation and not the underlying disease, but now that a potential cause has been identified, there’s “hope that this could help to pave the way” for creating medication to specifically target long Covid, and “give some patients a firm diagnosis,” Benjamin Krishna, the study’s co-author and an investigator at Cambridge University, said in a statement.
