Rubella, also known as German measles or three-day measles, is an infection caused by the rubella virus. This disease is often mild, with half of people not realizing that they are infected. A rash may start around two weeks after exposure and last for three days. It usually starts on the face and spreads to the rest of the body. The rash is sometimes itchy and is not as bright as that of measles. Swollen lymph nodes are common and may last a few weeks. A fever, sore throat, and fatigue may also occur. Joint pain is common in adults. Complications may include bleeding problems, testicular swelling, encephalitis, and inflammation of nerves. Infection during early pregnancy may result in a miscarriage or a child born with congenital rubella syndrome (CRS). Symptoms of CRS manifest as problems with the eyes such as cataracts, deafness, as well as affecting the heart and brain. Problems are rare after the 20th week of pregnancy.

जर्मन रोमान्तिका या जर्मन मसूरिका अत्यंत सूक्ष्म विषाणु (वाइरस) द्वारा होता है जिसका नाम रुबेला (Rubella) है। वर्ष के पूर्वार्ध में प्रकोप अधिक होता है। दाने निकलने के पूर्व अत्यत संक्रामक होता है। उद्भवन काल १७-१८ दिनों का होता है। जटिलताओं की संभावना कम होती है। एक आक्रमण जीवनपर्यंत रोग प्रतिशोधक शक्ति उत्पन्न कर देता है। साधारणता बड़े बच्चे तथा किशोर ही इस रोग के शिकार होते हैं।