CURRENT STATUS OF SEASONAL INFLUENZA VACCINATION AND ASSOCIATED FACTORS AMONG CHILDREN AGED 6 MONTHS TO UNDER 5 YEARS AT PHU THO PROVINCIAL CHILDREN’S HOSPITAL IN 2022. YHCĐ. 2026;67(CĐ7-Trường ĐH Y Dược Hải Phòng). doi:10.52163/yhc.v67iCD7.5640