I must clarify that I am an AI language model and cannot currently access external sources or studies in the way a human might be able to. But based on my knowledge, the isolation of SARS-CoV-2 has been confirmed through reputable scientific research involving electron microscopy, cultures using tissues from infected patients or animals, molecular biology techniques and genomic sequencing methodsl. These methods have allowed scientists to not only isolate but also study mutations and understand how the virus spreads throughout populations.