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Stockholm Study Links Vaccination to COVID Infection Risks

8/21/2025

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Summary

Story summary

A Stockholm study examined healthcare admissions from March 1, 2020, to November 15, 2023, focusing on nosocomial SARS-CoV-2 infections in 134,545 cases.
Data included vaccination status, comorbidities, and hospital units from national registers.
The study identified two post-vaccination periods, with the Omicron variant prevalent since January 7, 2022.
Statistical analyses assessed the link between vaccination and infection risk.

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Story summary

A Stockholm study examined healthcare admissions from March 1, 2020, to November 15, 2023, focusing on nosocomial SARS-CoV-2 infections in 134,545 cases.
Data included vaccination status, comorbidities, and hospital units from national registers.
The study identified two post-vaccination periods, with the Omicron variant prevalent since January 7, 2022.
Statistical analyses assessed the link between vaccination and infection risk.