The Wuhan coronavirus may have originated in bats or snakes and been transmitted to humans through an intermediary species

NL63

(2002)

Intermediate

hosts

Sars

(2003)

(Civet)

Mers

(2012)

?

Wuhan CoV

(2020)

NL63

(2002)

Intermediate

hosts

Sars

(2003)

(Civet)

Mers

(2012)

?

Wuhan CoV

(2020)