Home » ‘For those who have recovered from Covid, the risk of being seriously reinfected remains low’ – Society

‘For those who have recovered from Covid, the risk of being seriously reinfected remains low’ – Society

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‘For those who have recovered from Covid, the risk of being seriously reinfected remains low’ – Society

Natural immunity confers good and lasting protection for at least 18 months. From the University of Bologna, the new study, unique in the world for a period of time, published in the journal Frontiers in Public Health



The risk of reinfection with a severe or lethal form of Covid-19 remains extremely low for those who became infected, even 12 months after the first infection.

This is what a new study reveals – the first in the world with this time scale – published in the journal Frontiers in Public Health and coordinated by Lamberto Manzoli, professor in the Department of Medical and Surgical Sciences of the University of Bologna.

The investigation followed the cases of over 100,000 patients in an Italian region, Abruzzo, who contracted Covid-19 from the beginning of the pandemic until last February, investigating the rate of reinfection and secondary disease over a year. away from the first recovery.

‘There is already a large international literature showing a very low risk of serious illness for the healed, but to date no one has followed patients for more than twelve months,’ says Manzoli.

‘It was therefore important to note that, as for other coronaviruses, natural immunity also for Sars-CoV-2 confers good and lasting protection, at least up to eighteen months’. In fact, from the data collected it emerged that less than 1% of the recovered had a second infection. More importantly, fewer than one in 10,000 has had severe Covid-19 after recovery. In detail, out of 119,266 patients, 729 reinfections were recorded, with eight cases of hospitalization and two deaths. Other data: the cases of reinfection have remained substantially constant over time, even at a distance of 18-22 from recovery: an element that, the researchers explain, suggests that the protection that derives from natural immunity usually resists even more than 12 months

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Despite the arrival of the extremely contagious Omicron variant, however, it has increased the risk of contracting the disease even for those who have already recovered, according to the Alma mater study, cases of serious illness or death remain close to zero. And the study showed that the vaccine continues to provide a significant protection shield: for vaccinated people the risk of reinfection is in fact about 70% lower than for non-vaccinated people, is underlined by the University of Bologna. The study was published in the journal Frontiers in Public Health under the title ‘Risk of SARS-CoV-2 Reinfection 18 Months After Primary Infection: Population-Level Observational Study’. The survey was coordinated by Lamberto Manzoli of the University of Bologna; Cecilia Acuti Martellucci and Maria Elena Flacco from the University of Ferrara also participated, together with Graziella Soldato, Giuseppe Di Martino, Roberto Carota and Antonio Caponetti from the breaking latest news ASL.

In the photo, Piazza Grande on the occasion of Shrove Thursday

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La Pressa editorial staff

La Pressa editorial staff

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