Ayo makuru y'abarwayi y'ikigo cy'Ubushinwa cyo guhangana no kurinda indwara (Chinese Centre for Disease Control and Prevention, CCDC), yasanze abarenga 80% by'abayirwaye bayirwaye byoroheje, mu gihe abasanzwe barwaye n'abageze mu zabukuru - b'imyaka 80 kuzamura - ari bo yibasira kurusha abandi.
