Covid: Omicron represents 88% of cases, Delta 69% of resuscitations

COVID – Omicron is transmitted a lot, but causes fewer serious forms than the Delta variant, this is the observation made by several studies around the world in recent weeks. A conclusion that has again been confirmed by the Department of Research, Studies, Evaluation and Statistics (Drees) in France, this Friday, January 14.

In its latest study on Omicron, whose data was collected from January 3 to 9, the DREES shows that this variant certainly represents a very large proportion of cases, but is less present than Delta in hospitalized cases and in intensive care, qu whether they are vaccinated or not.

The figures thus show that the Omicron variant represented, in the period analysed, 88% of positive tests but just over 52% of hospitalizations only. In Critical Heal, the percentage drops to 31%, which means that 69% of Critical Heal entries can be attributed to the Delta variant.

Furthermore, the data show that “on first analysis, hospital stay durations appear to be shorter for the Omicron variant compared to the Delta variant.”

Over-representation of the unvaccinated in “Covid-related events”

With regard to the impact of vaccination, the DREES considers that “vaccine protection remains high against serious forms of infection with the Omicron variant, even if it is lower than that against the Delta variant”.

However, the organization wonders what could explain the lesser severity of the Omicron variant. It is mentioned in particular the fact that Omicron arrived in a context of strong immunity of the population, people already infected, in particular by Delta, being able to be better immunized against the serious forms. It would also be more represented in young and vaccinated populations than the Delta, which could explain their better resistance to symptoms, underlines the DREES.

In its study, the Drees also recalls that there is “an overrepresentation of non-vaccinated people in events linked to Covid compared to their share in the general population”.

More specifically, the study analyzed contamination data between December 6, 2021 and January 2, 2022 for the 9% of French people over the age of 20 who were not vaccinated. This share represents 19% of positive PCR tests in symptomatic people, 44% of hospital admissions with Covid-19, 44% of deaths after hospitalization, but also 58% of critical care admissions.

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