Question

Origin of covid - 19​

Answer 1

Answer:

It is believed to have zoonotic origins and has close genetic similarity to bat coronaviruses, suggesting it emerged from a bat-borne virus. There is no evidence yet to link an intermediate animal reservoir, such as a pangolin, to its introduction to humans.

The virus shows little genetic diversity, indicating that the spillover event introducing SARS-CoV-2 to humans is likely to have occurred in late 2019. Epidemiological studies estimate each infection results in 1.4 to 3.9 new ones when no members of the community are immune and no preventive measures taken.

Explanation:

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Answer 2

it is believed to have zoonotic origins and has closed genetic similarity to bat coronavirus, suggesting it emerged from a bat brone virus. there is no evidence yet to link and intermediate animal reservoir , such as a pengoline, to its introduction to humans.

the virus shows little genetic diversity, indicating that the the spill over event introducing SARS-CoV-2 to human is likely to have occurred in late 2019. epidemiological studies estimate each infection results in 1.4 to 3.9 new ones when 9 members of the community are immunity and no preventative measures taken.