What's the data to inform us how this infection spread so quickly? It seems that the virus first appeared in around November 2019 in China and an infected person visited the seafood market in Huanan, Wuhan where it is likely the virus mutated in that environment becoming far more virulent. So, maybe we are looking at one person, a super spreader, or more than one person getting infected when the virus was amplified by the animals there, or several viruses combined in the animals to form the SARS-Cov-2 virus infection those persons.
But the virus rapidly spread to other countries without animal reservoirs amplifying it. How did that happen?