"R0 is the average number of people who will catch the disease from a single infected person, in a population that’s never seen the disease before.

Johns Hopkins interactive live map of cases of the global incidence of 2019-nCoV cases.

Pigs can be infected by avian influenza and human influenza viruses as well as swine influenza viruses. When influenza viruses from different species infect pigs, the viruses can reassort (i.e. swap genes) and new viruses that are a mix of swine, human and/or avian influenza viruses can emerge.