SARS-CoV and MERS-CoV have been shown to originate from bats and have been transmitted to humans via civets and camelids, respectively.
Imekuwa ikifahamika kwamba SARS-CoV na MERS-CoV vina chimbuko kutoka kwa popo na vilisambazwa kwa binadamu kupitia paka ngawa na ngamia, mtawalia.