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April 12, 2026Open Access

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

Abstract

In mainland China, strict COVID-19 measures between 2020 and 2022 significantly reduced the incidence of RIDs. However, after COVID-19 management was downgraded and restrictions were relaxed in early 2023, these diseases resurged, demonstrating a 'suppression-rebound' effect.

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

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Abstract

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