Pregnant women, adults, babies, and people with weakened immune systems are at risk for serious complications. Series complications from this illness are encephalitis (swelling of the brain), meningitis (inflammation of the tissue covering the brain and spinal cord) and deafness. Symptoms generally begin usually 16-18 days but can vary from 12-25 days from exposure. A person is contagious from 2 days before to 5 days after the onset of parotitis. Most people with mumps recover completely in a few weeks. Some people with mumps may not always appear to have symptoms and atypical symptoms (cold-like symptoms including running nose, and/ or post nasal drip) may occur.