I had no immune system for months after my bone marrow transplant. Here’s how I avoided viral illness, and how you can, too. It’s easier than you think. writes AM Carter  This is by far and away the best post I’ve read on how to stay safe. I urge you to check it out here. Her major advice: “Constant, thorough hand washing and hand sanitizing. Constant, thorough cleaning and sanitizing of surfaces that I touched. Completely avoiding primary vectors of transmission. Clean the things you touch.   Avoid People, and the things people touch. Upon returning home from any excursion, I wipe down my keys, phone, credit card (if I…