On Mar. 15, 2021, Twist Bioscience announced that it had started shipping its new synthetic RNA reference controls, which include the new variant strains of SARS-CoV-2 B.1.351 and P.1, that have emerged in South Africa and Brazil, respectively.

In addition, Twist began shipping synthetic RNA controls that cover the B.1.1.7 strain of SARS-CoV-2 in a stabilized format that can be shipped and stored at room temperature.