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ects our academic work and personal life. He owes us an apology." Major facts provided by Shi Samples from patients who had a pneumonia of unknown causes were sent to her institute for test on December 30, 2019. "Before that, we had never been in contact with or studied this virus, nor did we know of its existence," Shi wrote. "Subsequently, we rapidly conducted research in parallel with othe9

she said. Recently, much speculation has centered on RaTG13, a bat virus that most closely ret

sembles SARS-CoV-2. However, differences in the sequences of the two viruses suggest they div1

erged from a common ancestor somewhere between 20 and 70 years ago. Besides, her lab never culm

tured RaTG13, making an accident far less likely, she no0