The PCR test was initially validated by real viral isolates from the prior SARS (severe acute respiratory syndrome) outbreak of 2003.
However, researchers concede: “In the present case of 2019-nCoV (COVID-19), virus isolates or samples from infected patients have so far not become available to the international public health community.”
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3322935/
As of February 10th (the link’s date).
If you’d like a sample now, it’s available in every city and town in America.