Weekly Report

Week 19 2025

Article source: Date time:2025-05-15 
Download:China flu report 2519.pdf

Summary

 

·Influenza activity in the southern provinces and northern provinces was low. There was no ILI outbreak reported in this week.


·Among influenza viruses antigenically characterized by CNIC since October 1, 2024, 3382(98.6%) influenza A(H1N1)pdm09 viruses were characterized as A/Victoria/4897/2022-like; 65(62.5%) influenza A(H3N2) viruses were characterized as A/Thailand/8/2022(egg)-like, 61(58.7%) influenza A(H3N2) viruses were characterized as A/Thailand/8/2022(cell)-like; 141(97.2%) influenza B/Victoria viruses were characterized as B/Austria/1359417/2021-like.


·Among the influenza viruses tested by CNIC for antiviral resistance analysis since October 1, 2024, all but 99 influenza A(H1N1)pdm09 were sensitive to neuraminidase inhibitors, all A(H3N2) and B viruses were sensitive to neuraminidase inhibitors; all A(H1N1)pdm09, A(H3N2) and B viruses were sensitive to endonuclease inhibitors.