Author(s)

Jiali Lian ¹, Yunpeng Ji ¹, Xiaoyan Pang ², Xin Wang ¹, Yueqi Jia ^1,2

Affiliation(s)

¹ School of Public Health, Baotou Medical College, Baotou, Inner Mongolia, 014040, China
² Inner Mongolia Maternal and Child Health Hospital, Hohhot, Inner Mongolia, 010000, China

Corresponding Author

Yueqi Jia

ABSTRACT

To analyze the epidemic characteristics of influenza A (influenza A) and influenza B(influenza B) in Hohhot from October 2022 to December 2023 and the clinical manifestations of children with influenza A and influenza B in different age groups, so as to provide evidence for the prevention and control of influenza in this region. A retrospective analysis was performed on 8042 children (aged 0-18 years) suspected to have influenza A and influenza B from October 2022 to December 2023 in the Maternal and Child Health Hospital of Inner Mongolia Autonomous Region. The epidemic characteristics and clinical manifestations of children with influenza A and influenza B were analyzed with statistical analysis. From October 2022 to December 2023, the positive detection rate of influenza A was 6.0% (484/8042) and that of influenza B was 3.2% (261/8042). The main clinical manifestations of children with H1N1 influenza are upper respiratory tract infection, pneumonia, fever, cough, bronchitis. The main clinical manifestations were upper respiratory tract infection, pneumonia, cough, bronchitis and fever. The positive rate was 6.9% (250/3615) in males and 5.3% (234/4427) in females. The positive rate was 3.9% (141/3615) in males and 2.7% (120/4427) in females. The positive detection rate of influenza A was higher in 6-12 years old [9.0% (103/1149)], and the positive rate of influenza B was higher in 3-6 years old [4.9% (133/2741)]. The positive rate of influenza A and B in 1-3 years old, 3-6 years old and 6-12 years old was significantly different from that in 0-1 years old (P < 0.01). The positive detection rate of influenza A was higher in February-March and November-December. After March 2023, the positive detection rate of influenza A decreased significantly, and no positive influenza B was detected from April to September. The positive rate of B current was mainly concentrated in February-March and November-December. In the second half of 2023, the positive detection rate of influenza B increased month by month, and the positive detection rate of influenza B remained at a high level from November to December. The positive detection rates of A and B influenza were higher in Hohhot area from 1 to 12 years old. The positive detection rates of A and B were compared among all age groups and genders, P < 0.05, and the difference was statistically significant. The main clinical manifestations were upper respiratory tract infection, pneumonia and fever. Attention should be paid to strengthening preventive measures for different groups and major seasons.

KEYWORDS

Influenza A, Influenza B, Epidemiology, Prevention, Clinical Picture

CITE THIS PAPER

Jiali Lian, Yunpeng Ji, Xiaoyan Pang, Xin Wang, Yueqi Jia, Epidemiology and Clinical Characteristics of Influenza A and B in Children of Different Age Groups. MEDS Public Health and Preventive Medicine (2024) Vol. 4: 14-21. DOI: http://dx.doi.org/10.23977/phpm.2024.040203.

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