A new study released Tuesday purports to find “the first evidence that chemicals found in ground water near fracking sites can impair the immune system.”

Importantly, the report’s alarmist topline finding is not based on water samples taken near fracking sites or fracking fluid itself. Instead, it’s based on the evaluation of baby mice whose mothers were continuously exposed to a concoction of 23 “fracking chemicals” at extremely high concentrations during pregnancy.

If you’re getting a sense of déjà vu here, there’s a pretty good reason — this is the fourth attempt by the University of Missouri research duo of Susan Nagel and Christopher Kassotis to use studies in which mice ingested implausible concentrations of multiple chemicals to try to link fracking to health problems.

Read the full blog post on EIDHealth.org.