Timeline of all the viruses identified in 60 children (29.6% of all human rhinovirus [HRV]–positive children) who had ≥2 picornaviruses detected during their enrollment. All respiratory syncytial virus (R) and influenza A virus (Fa) detections were contained within periods encapsulated using dashed boxes. Abbreviations: A, adenovirus; black hexagons, untypable picornavirus; blue hexagons, Human rhinovirus C; green hexagons, enterovirus; M, metapneumovirus; N, coronavirus NL63; P, parainfluenzavirus; red hexagons, Human rhinovirus A; yellow hexagons, Human rhinovirus B.