As a result of a continuous investigation of more than 25,000 medical personnel working in public hospitals in the UK for 7 months, it was found that once infected with the Corona 19 virus (SARS-CoV-2), the probability of the next infection decreased by 84%.
The UK is conducting a continuous investigation called SIREN (Sars-cov-2 Immunity & REinfection EvaluatioN) targeting medical personnel working in public hospitals who answered the question, What would be the second chance of infection once infected with Corona 19? Subjects who participated in this survey received PCR tests and antibody tests every 2 to 4 weeks, and answered questionnaires about various symptoms and exposure conditions.
A research team conducted by a research team from local health authorities in Collindale, UK was a study that calculated the probability of re-infection of Corona 19 from the results of SIREN from June 2020 to January 2021. According to SIREN, a total of 25,661 subjects infected 8,278 32.3%, and 17383 67.7% unexperienced. %. Pathologically, the probability of infection with Corona 19 per day was 0.0076%, and the inexperienced was 0.0573%.
The research team calculated the morbidity rate before and after Corona 19 infection according to a proportional risk model using Poisson distribution. As a result, it was found that during the 7-month period, once infected with Corona 19, the probability of the next infection was reduced by 84%. In addition, the probability of symptomatic infection was lowered, and the probability of symptomatic infection decreased by 93% when infected once.
In addition, after December 8, 2020, which is the end of the analysis target period, vaccinations for medical workers in the UK began in earnest, and 52.2% of all participants had received the vaccination. However, since the data were 0.4% of the total data 21 days after vaccination, when the vaccine became effective, the researchers concluded that the vaccine’s impact on this study was likely to be insignificant.
Regarding this study, the research team said that once infected with Corona 19, most of them produce immunity that is effective against future infections. Said. Related information can be found here.