Why dirt and microbes could be good for us

Distinguished Wall Professor Brett Finlay discusses whether we have taken our war on germs a step too far. Although hygiene and antibiotics have overall improved our health, we might have taken our war against germs too far. Dr. Finlay talks about why a little dirt and our microbes might be good for all of us, as he discusses his new book, Let Them Eat Dirt, co-authored with Marie-Claire Arrieta. Watch the Q&A here: https://youtu.be/rSwhS_HZWe4