PFAS Exposure Associated with Suppressed Immune Response in Vaccinated Adults, Study Reports A 2026 study has found that adults with higher exposure to per- and polyfluoroalkyl substances (PFAS) produced significantly fewer antibodies after receiving a COVID-19 vaccine. The research, published in the journal Environmental Research, examined 74 fully vaccinated adults living in a Michigan community known to have PFAS-contaminated drinking water. According to the study, participants with elevated serum levels of a specific PFAS compound, PFHxS, showed roughly 40% lower IgG antibody concentrations against the COVID-19 spike protein compared to those with lower exposure. The lead author of the research stated that…

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