SARS CoV-2 Re Infection after Natural Infection Compared with Previously Sero-Negative: Descriptive Longitudinal Study

Medical Journal of Dr. D.Y. Patil Vidyapeeth

article

Chaklader, Biswajit¹  Srivastava, Kajal¹  Rathod, Hetal¹  Jadhav, Sudhir L.¹  Bhawalkar, Jitendra S.¹  Thakur, Kavita¹  Verma, Prerna¹ 

[1] Dr. D. Y. Patil Medical College, Hospital and Research Centre

关键词: COVID-19;    re-infection;    SARS-CoV-2;    serosurvey;   

DOI  :  10.4103/mjdrdypu.mjdrdypu_807_21

学科分类：社会科学、人文和艺术（综合）

来源: Wolters Kluwer Medknow Publications

【 摘 要 】

Background:  WHO declared SARS-CoV-2 infection as pandemic on March 11, 2020. As cases recovered, it became important to know the rate of re-infection from the same virus and its severity. Therefore, the study was done to find out re-infection rate among the previously infected individuals. Aim:  To find out re-infection rate among already exposed and nonexposed individuals. Materials and Methods:  A cohort study was done over 5000 previously serosurveyed individual. They were followed up via telephone. Data was collected using a questionnaire with questions regarding infection post-serosurvey, severity of infection among relatives and vaccination status. Thus information collected was uploaded in Google form. Results:  Re-infection rate among previously exposed individuals was 1.2%; at the same time period, 6% of nonexposed individuals got infected. All the re-infection cases were mild, whereas 80.74% of individuals who got infected for the first time had mild symptoms. Exposure to SARS-CoV-2 in relatives who were staying with participants was found to be 3.23% and 4.22% among previously exposed and non-exposed individuals respectively. 17% of previously nonexposed individuals were fully vaccinated, whereas 0.65% of exposed individual got fully vaccinated. Conclusion:  Re-infection rate in the study was less and mild on the basis of severity. Infection rate among the nonexposed was at a higher side stating that chances of getting re-infected are much lesser. Previously exposed individuals did not show the same type of interest for vaccination compared to previously nonexposed individuals.

【 授权许可】

CC BY-NC-SA