Reference:
Cavanaugh, A. M., Spicer, K. B., Thoroughman, D., Glick, C., & Winter, K. (2021). Reduced risk of reinfection with SARS-CoV-2 after COVID-19 vaccination – Kentucky,
May–June 2021. Morbidity and Mortality Weekly Report, 70(32), 1081-1083. https://www.cdc.gov/mmwr/volumes/70/wr/pdfs/mm7032e1-H.pdf
Summary:
A study conducted in Kentucky investigated the impact of COVID-19 vaccination on reinfection rates among individuals previously infected with SARS-CoV-2. The research involved a case-control analysis comparing vaccinated individuals to unvaccinated individuals who had contracted the virus in 2020. Findings showed that unvaccinated participants had a 2.34 times higher likelihood of reinfection compared to those who were fully vaccinated. Specifically, only 20.3% of reinfected individuals were fully vaccinated, versus 34.3% in the control group. The study suggests that vaccination not only enhances immunity but also provides substantial protection against reinfection. These results support the recommendation that all eligible individuals, including those with prior infections, should receive vaccination to mitigate future infection risks.