https://www.cam.ac.uk/research/news/covid-19-genetic-network-analysis-provides-snapshot-of-pandemic-origins?from=groupmessage&isappinstalled=0
唔知大家有冇認真睇 香討就係咁打哂飛機 但click入去 人哋根本就覺得係武漢 US係多人 但origin係武漢
Copy from link:
Forster and colleagues found that the
closest type of COVID-19 to the one discovered in bats – type ‘A’, the “original human virus genome” – was present in Wuhan but surprisingly was not the city’s predominant virus type.
Mutated versions of ‘A’ were seen in Americans reported to have lived in Wuhan, and a large number of A-type viruses were found in patients from the US and Australia.
Wuhan’s major virus type, ‘B’, was prevalent in patients from across East Asia. However, the variant didn’t travel much beyond the region without further mutations – implying a "founder event" in Wuhan, or “resistance” against this type of COVID-19 outside East Asia, say researchers.
The ‘C’ variant is the major European type, found in early patients from France, Italy, Sweden and England. It is absent from the study’s Chinese mainland sample, but seen in Singapore, Hong Kong and South Korea.
Variant ‘A’, most closely related to the virus found in both bats and pangolins, is described as “the root of the outbreak” by researchers. Type ‘B’ is derived from ‘A’, separated by two mutations, then ‘C’ is in turn a “daughter” of ‘B’.
Mutated Type A =/= Type A
Mutated Type A 係derives from Type A
文中重點:
Mutated Type A, Type B and C 都係由Wuhan Type A 到變異出嚟