Differences in symptoms and clinical outcomes of COVID-19 infection across vaccination status and age groups during the national pandemic from December 2022 to February 2023 in China: a cross-sectional study.

ABSTRACT:

Background

The end of the 'dynamic zero-COVID' policy on 7 December 2022 caused an immediate Omicron outbreak in China, which is the first nationwide COVID-19 wave in China. We aimed to assess the difference in COVID-related symptoms and clinical outcomes across vaccination status and age groups.

Methods

This was a cross-sectional study. Data were collected via online survey or telephone interview. The target population was adults who had been infected during this wave since December 2022 and were not hospitalized due to COVID-19 infection at the survey time. Information on COVID-19 infection status, COVID-related symptoms, COVID-related pneumonia, clinic visits, hospital admissions, and dose of vaccines received was collected. Data were analyzed by log-binomial regression a

SUBMITTER: Hua N 

PROVIDER: S-EPMC12606791 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature