Epidemiological characteristics of recovered COVID-19 cases with re-positive nucleic acid in Pudong New Area of Shanghai from May to June 2022
10.19428/j.cnki.sjpm.2024.24129
- VernacularTitle:2022年5—6月上海市浦东新区新型冠状病毒感染出院病例复阳流行病学特征
- Author:
Dan LIU
1
;
Zou CHEN
1
;
Mengjue HU
1
;
Chuchu YE
1
;
Yanxin XIE
1
Author Information
1. Shanghai Pudong New Area Center for Disease Control and Prevention, Shanghai 200136, China
- Publication Type:Journal Article
- Keywords:
coronavirus infection 2019;
re-positive nucleic acid;
epidemiological characteristic
- From:
Shanghai Journal of Preventive Medicine
2024;36(9):842-845
- CountryChina
- Language:Chinese
-
Abstract:
ObjectiveTo understand the epidemiological characteristics of recovered COVID-19 cases with re-positive nucleic acid in Pudong New Area of Shanghai, and to provide a reference for the prevention and control of COVID-19. MethodsA three-month health follow-up and nucleic acid testing were conducted on 339 COVID-19 cases cured and discharged between May 20 and June 20, 2022, in Pudong New Area, Shanghai, to analyze their epidemiological characteristics. ResultsAmong the 339 follow-up cases, 75 cases experienced re-positive nucleic acid results, with a recurrence rate of 22.12%. Factors such as gender, age group, occupation, presence of heart disease, hypertension, and full vaccination status had no effect on the re-positive results. Being diagnosed as a confirmed case during the first presence of infection, having diabetes, and a hospitalization period of ≤7 days were related factors for recurrence. The median interval between discharge and re-positive nucleic acid results was 26 days. The close contacts of the re-positive cases did not contract COVID-19 after the isolation and observation period. ConclusionThere is a possibility of re-positive nucleic acid results after COVID-19 recovery and discharge. Cases initially diagnosed as confirmed cases and those with a hospitalization period of no more than 7 days have a high rate of re-positivity. No secondary transmission is observed from the re-positive cases.
