In February 2020, researchers from the Wuhan Institute of Virology (WIV) published an article in the journal Nature explaining that a virus extracted from bats was over 96 percent similar to SARS-CoV-2 – the virus that causes COVID-19. Did COVID-19 come from bat coronavirus RaTG13? Did the WIV ever culture RaTG13? In this episode, CGTN explains how RaTG13 differs from SARS-CoV-2.