In response to both hMPV viruses, COPD WD-BECs produced detectable IFN-β from 5 to 18 d.p.i., reaching similar peak means at 15 d.p.i. for CAN 97-83 (310 pg/mL; Figure 6a) and 11 d.p.i. for AUS-(277 pg/mL; Figure 6b). Here, IFNB1 is linked to chronic obstructive pulmonary disease.