Patients Admitted for Variant Alpha COVID-19 Have Poorer Outcomes than Those Infected with the Old Strain

Area of Science:

• Virology
• Infectious Diseases
• Public Health

Background:

• The alpha variant of COVID-19 emerged in early 2021, showing rapid spread across Europe.
• While increased infectivity of the alpha variant is established, its clinical outcomes compared to earlier strains remain less understood.

Purpose of the Study:

• To compare the clinical presentation and outcomes of COVID-19 patients infected with the alpha variant versus the older strain.
• To assess the virulence and risk of severe outcomes associated with the alpha COVID-19 variant.

Main Methods:

• A retrospective study identified patients hospitalized with variant alpha COVID-19 (January-April 2021) at Cannes General Hospital.
• Demographic data, inflammatory markers, and clinical characteristics were collected for alpha variant patients.
• Patients with the 20E (EU1) strain (October-December 2020) served as controls for comparative analysis.

Main Results:

• 157 patients with alpha variant COVID-19 were analyzed (mean age 73 years, 58% male).
• Comorbidities (hypertension, diabetes, obesity) were prevalent (92%) but similar between groups.
• Patients with the alpha variant had a 3.8-fold higher risk of death or ICU transfer compared to the old strain.

Conclusions:

• COVID-19 patients infected with the alpha variant faced a significantly higher risk of adverse outcomes.
• These findings suggest increased virulence of the alpha variant, independent of patient background characteristics.
• The study highlights the clinical impact of SARS-CoV-2 variants on disease severity.