Four of these coronaviruses circulate continuously within the human population and generally cause only mild symptoms of the common cold in adults and children worldwide: OC43, HKU1, HCoV-229E, NL63.
Nne kati ya virusi hivi vya korona vinaendelea kusambazwa katika idadi ya watu na hutoa dalili za kawaida zisizo kali za mafua kwa watu wazima na watoto duniani: -OC43, -HKU1, HCoV-229E, -NL63.