Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the right order to form a meaningful and coherent paragraph.

A. At the end of 2019, a new type of coronavirus started spreading in China.
B. This type of coronavirus is often called 2019-nCoV, novel coronavirus, or COVID-19.
C. It is believed that the virus was transmitted from animals to humans.
D. Some of the first cases were diagnosed in people who had visited a market selling live seafood and animals.