Epidemic trends and characteristics of notifiable infectious diseases in mainland China during the COVID-19: a nationwide surveillance study, 2020–2024

Key Points

• This research examines the trends and characteristics of notifiable infectious diseases in mainland China during and after the COVID-19 pandemic.
• Nationwide surveillance conducted from 2020 to 2024
• Analysis of incidence rates of notifiable infectious diseases
• Comparison of data before and after COVID-19 restrictions were lifted
• Significant reduction in respiratory infectious diseases (RIDs) during strict COVID-19 measures
• Post-2022 management showed a resurgence of RIDs
• The data revealed a clear 'suppression-rebound' effect following the lifting of restrictions