How was bubonic plague passed on?

What is the bad thing about being circumcised? Can life be made convenient in incontinence? What item represents the liver? Can CPR on an infant cause bruising? What cysts treatments are recommended? Which one is worse obese or anorexia? What will eventually happen to the bones in the skull? What does a narcissist do to get supply? Why is our body not made of spongy bone tissue? How many red blood cells are in a teaspoon of blood? An eating disorder by NEDIC are? Is it okay to feel quickening early? Should you be on be on bedrest if you have shingles? What are the brain and spinal cord protected by in the human? How does it feel when your balls drop? Causes of throw up and diarrhea? WHY starch and cellulose require different digestive enzymes? How can you have a misscarrige? What term describes foreign molecules that enter the immune system? What is fluid injected into the bronchi and then removed for examination?