While other PFAS haven’t been as well-studied, that isn’t the same as giving them a green light. FDA scientists who analyzed industry data on 6:2 FTOH and its metabolites reported signs of immune effects in rodents. This summer, the Agency for Toxic Substances and Disease Registry, a part of the CDC, issued a “statement on potential intersection between PFAS and Covid-19.” The agency noted that “little is known” about how PFAS exposure could affect the risk of infection with Covid-19 and that research is needed. “CDC/ATSDR recognizes that exposure to high levels of PFAS may impact the immune system. There is evidence from human and animal studies that PFAS exposure may reduce antibody responses to vaccines and may reduce infectious disease resistance,” the statement read.
It’s an important research question, says Birnbaum, who notes that scientists who have measured PFAS in groups of people as part of environmental