Causes of mumps. Officials say the counties are mecklenburg, iredell and cabarrus county. Yesterday we told you about a case in Iredell County and another in mecklenburg. The medical director for the Health Department stopped by wbtv today to address whether officials expect more cases. It hasnt grown. This is the same number weve had since the end of last week. And quite frankly, i would expect it to grow because number one, the incubation period for mumps is somewhere between 1225 days. The doctor says mumps circulates around the world and shows up in the u. S. From time to time and most of you are protected because of the vaccines you received as a child but warns folks with weaker immune systems can easily get the mumps. And what a gorgeous sunny day. You can see the big bright skies. A few puffy clouds from the hd and we think you are going to love chief meterologist, eric weekend. He is live in the first alert weather center. And oddly enough the quiet weather is the story becaus