This study states that Rubella was announced dispensed with in the United States in 2004 and in the entirety of the Americas in 2015; notwithstanding, global importations from nations where rubella is endemic actually happen. Rubella is a viral disease described by a summed up rash, lymphadenopathy, and arthralgia, however up to half of contaminations might be asymptomatic. In spite of the fact that rubella is typically a mellow ailment, contamination with rubella infection during pregnancy can bring about unsuccessful labor, stillbirth, or inherent rubella disorder, a genuine condition portrayed by birth absconds, including hearing impedance, neurological irregularities, and cardiovascular deformities. 

Given the grave results of rubella in pregnancy, pre-birth rubella immunoglobulin G (IgG) testing for maternal invulnerability is the norm of care. IgG testing is suggested by the American College of Obstetricians and Gynecologists to distinguish ladies who are not invulnerable to rubella for baby blues immunization to forestall future rubella contamination. 

Hence we conclude that the Demonstrative testing for rubella ought to be performed when rubella contamination is suspected dependent on clinical side effects, especially when global travel or realized openness has happened.

Reference link- https://cvi.asm.org/content/24/9/e00102-17