Meal kits are all the rage right now. With many of us continually searching for healthy meals that are as convenient as possible, what could be better than having all the ingredients for a home-cooked meal delivered directly to your home? But shipping perishable foods in a way that keeps them safe and fresh can be a challenge. This week on “Take Care,” Don Schaffner , a food microbiologist at Rutgers University, discusses the safety precautions meal kit consumers should be aware of. Schaffner