There are currently 2 scientific analyses to trace the origin of covid-19.
China used genome sequencing (Haplotype analysis) which categorizes covid-19 virus into 2 strains and 5 generations. China scientists traced the ancestral H38 back to the US and the US had all the 5 generations in its early outbreak.
https://gnews.org/123001/
Please watch the video below for the Taiwanese virologist's explanation about the basic understanding of Haplotype analysis.
Cambridge University scientists used Phylogenetic network analysis which categorizes covid-19 virus into 3 strains (A-type, B-type & C-type). Cambridge University scientists discovered that the ancestral A-type virus was predominantly found in the US.
http://sg-stock.blogspot.com/2020/04/cambrigde-university-got-caught-for.html
We should understand by now that when an ancestral virus type is predominantly located in a region, that region must be the origin of the virus. The 2 different scientific analyses point to the US as the origin of the virus.
Malaysia also used Haplotype analysis for its covid-19 analysis and discovered the presence of all the 5 generations of covid-19.
https://www.thestar.com.my/news/nation/2020/03/27/health-ministry-detects-five-039generations039-of-covid-19-cases-linked-to-tabligh-cluster
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