The most recent common ancestor (MRCA) of all coronaviruses is estimated to have existed 8,000 BCE, although some models place the common ancestor 55 million years ago or more, implying coevolution at long-term in bat and bird species.
Kizazi cha hivi punde cha virusi vyote ya korona (MRCA) kinakadiriwa kilikuwa hivi karibuni kama 8000 BCE, ingawa mifano kadhaa huchukua nafasi ya kizazi cha kawaida kwa miaka milioni 55 au zaidi, ikimaanisha inashirikiana kuwa muda mrefu na aina ya spishi ya popo na ndege.