https://chatgpt.com/share/67e9741d-bcf4-8000-bb60-26dc50e6fa5f

Where was the closest sequence observed before the first COVID-19 sequence?

The closest known sequence to the first identified SARS-CoV-2 genome (from Wuhan, China, in December 2019) comes from bat coronaviruses, particularly RaTG13, which was found in a bat (Rhinolophus affinis) in Yunnan, China, in 2013. RaTG13 shares about 96.2% genetic similarity with SARS-CoV-2, making it the closest known relative at the time. Additionally, other similar sequences, such as BANAL-52, BANAL-103, and BANAL-236, were later discovered in bats in Laos, showing even closer similarity in certain regions of the genome. Would you like more details on these related viruses?

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