Delta variant: How do I get tested for it?

With the highly contagious delta strain of COVID-19 now accounting for a majority of cases in the United States, many are wondering how to determine which variant of COVID-19 they have been infected with.

Heba Mostafa, Ph.D., assistant professor of pathology at Johns Hopkins University, told Fox News that in order to identify a variant, labs extract viral RNA to undergo sequencing. Researchers then analyze data to determine the variant. "Variant information is linked to the sample and the data is communicated with the respective lab; the whole process can take up to four days," Mostafa said.