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Toxoplasma gondii and multiple sclerosis: A systematic review and meta‐analysis

According to the hygiene hypothesis, infections by agents such as parasites have a protective role against the risk of developing multiple sclerosis (MS). Among parasites, Toxoplasma gondii, an intracellular parasite, showed evidence of a protective effect. This study was undertaken to summarize the available evidence on the association between T. gondii infection and MS.