In a new study from the Centers for Disease Control and Prevention, researchers found unvaccinated people are more than twice as likely to be reinfected with COVID-19 as the fully vaccinated people.
The finding suggests all eligible people should be offered COVID-19 vaccination, regardless of previous SARS-CoV-2 infection status.
In the study, the team tested 246 Kentucky adults who were reinfected in May and June this year after previously being infected in 2020.
They were compared with 492 people who were matched by sex, age, and time of initial positive test.
The researchers found that unvaccinated people were 2.34 times as likely to be reinfected compared to people fully vaccinated with the Pfizer, Moderna or Johnson & Johnson vaccines.
They say the duration of infection-acquired immunity remains poorly understood and may be affected by the emergency of newer variants.
Some previous studies have found that blood samples from people previously infected with the original Wuhan strain had poor antibody responses to the Beta variant first identified in South Africa.
If you care about COVID, please read studies about vaccination reduces severe COVID-19 in people 65 and over and findings of prolonged brain dysfunction in COVID-19 survivors: A pandemic in its own right?
For more information about COVID and your health, please see recent studies about risk for severe COVID-19 increases with your BMI above this number and results showing that COVID-19 can trigger recurrent blood clots in arms.
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