German measles, or rubella, in darker-skinned individuals presents with a mild rash, fever, and swollen lymph nodes, which may be harder to detect on darker skin due to the subtler appearance of the rash. It is often a mild illness in children and adults, but rubella can be particularly dangerous if contracted during pregnancy, potentially causing birth defects. Treatment typically involves supportive care for symptoms such as fever and pain, and rubella can be prevented through vaccination with the MMR (measles, mumps, rubella) vaccine.