Figure 1: Chest CT images of a case 7 and case 8 (one pair of 11 month old twins) patient upon admission, who had no symptom. (A) Transverse chest CT images showed pulmonary consolidation and ground glass opacity (case 7 on 7 February). (B) Showed marked improvement after 5 days (case 7 on 13 February). (C) Lung CT of case 8 – the case 7’s younger brother on admission day (case 8 on 7 February).