New Studies Suggest Omicron Infections Are Less Severe Than Delta Ones

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Dec. 22, 2021 -- People who get COVID-19 infections caused by the Omicron variant are little apt to request infirmary care, compared with those infected by the Delta variant, according to 2 ample caller studies from the U.K. and South Africa.

The findings, which were released up of adjacent review, adhd to erstwhile glimmers of grounds suggesting that Omicron -- portion highly contagious -- whitethorn effect successful little terrible symptoms than its predecessors.

“This is helping america quantify however overmuch little terrible Omicron is than Delta, and it appears to beryllium betwixt 40 to 75% reduced hazard of hospitalizations, adjusted for galore factors, which is precise good,” said Eric Topol, MD, the editor-in-chief of Medscape and a cardiologist astatine Scripps Research Translational Institute successful La Jolla, CA.

The first analysis, which was done by the World Health Organization Collaborating Centre for Infectious Disease Modelling and Imperial College London, recovered that overall, radical infected by Omicron had astir a 20% reduced hazard of needing immoderate infirmary attraction for their infections and a 40% little hazard of an overnight infirmary stay, compared to those infected with Delta.

Meanwhile, radical who were re-infected -- meaning they caught Omicron aft recovering from a erstwhile COVID-19 corruption -- had a 50%-60% little hazard of needing infirmary care, apt reflecting the benefits of having immoderate anterior immunity against the aforesaid household of viruses.

The survey included everyone with polymerase concatenation reaction-confirmed COVID-19 successful the U.K. during the archetypal 2 weeks of December -- astir 56,000 Omicron cases and 269,000 Delta infections.

The second study, from researchers astatine the National Institute for Communicable Diseases successful South Africa, included much than 29,000 COVID-19 cases that had laboratory results highly suggestive of Omicron infections. Compared to radical infected with the Delta variant, those with presumed Omicron infections were astir 70% little apt to person terrible disease.

While the quality is hopeful for individuals, connected a colonisation level, wellness attraction systems whitethorn inactive beryllium stressed, the survey authors warned.

“Given the precocious transmissibility of the Omicron virus, determination remains the imaginable for wellness services to look expanding request if Omicron cases proceed to turn astatine the complaint that has been seen successful caller weeks,” said survey writer Neil Ferguson, PhD, who studies however infectious diseases dispersed astatine Imperial College London.

The survey authors accidental their findings are circumstantial to the U.K. and South Africa, wherever important portions of the colonisation person immoderate immune extortion from past infection. In different words, they whitethorn not use to countries wherever less radical person been vaccinated oregon recovered from a bout with COVID-19.

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