Takashita E, Kawakami C, Ogawa R, et al. Influenza A (H3N2) virus exhibiting reduced susceptibility to baloxavir due to a polymerase acidic subunit I38T substitution detected from a hospitalised child without prior baloxavir treat-ment, Japan, January 2019. Euro Surveill 2019: 24 (12):pii=1900170.