Rubella, a disease caused by a virus is known to be very common during pregnancies. The virus is transmittable to the fetus, resulting in congenital Rubella syndrome affecting the child when born. The symptoms of Rubella are fever, enlarged lymph nodes, redness, rashes, headache and runny noses. Viruses affect by taking over the host's DNA. They do this by inserting their own DNA into that of the host. Therefore, to test presence of a virus in a patient, their DNA can be tested for a trace of viral DNA. To test DNA, samples that can be obtained are blood, CSF, saliva and throat swabs. Of these, the blood test is most common.