The widespread use of antibiotics may permanently change our gut flora, increasing our risk of obesity and damaging our immune systems (newscientist.com)
There's another piece of evidence pointing to some sort of direct immune system damage: dental enamel defects also are found in close relatives to people who have been diagnosed with celiac disease, but who haven't been diagnosed with the condition themselves. (verywellhealth.com)
There is much to explore about these natural magnetic fields but the purpose here is to warn animal owners that consistent exposure to manmade electromagnetic radiation (ref # 2) can cause immune system damage, heart irregularities, and fertility or behavioral problems in both humans and animals. (thedogplace.org)