Researchers have launched new knowledge from a big omicron outbreak in Norway that provides a window into how the variant behaves amongst extremely vaccinated populations. The outbreak was attributed to a Christmas celebration and a pre-party in Oslo held on November 26. Listed here are a few of the key findings, based on the analysis just lately published within the open-access journal Eurosurveillance:
Vaccination standing and transmissibility
Researchers interviewed 111 out of 117 attendees. Amongst those that participated within the interviews, the median age was 38, 43% have been ladies, and 89% had obtained two doses of an mRNA vaccine.
Of the contributors, 66 had confirmed instances of COVID-19 and 15 had possible instances. Many of the contaminated have been absolutely vaccinated; nevertheless, not one of the attendees reported having a booster shot. In addition they had unfavourable assessments taken inside one to 2 days of the occasion.
“The entire assault fee for the Omicron variant was 74%,” based on the research, per different analysis displaying that omicron is probably going extra transmissible that earlier variants and that vaccines are much less efficient in stopping its unfold.
All instances however one have been symptomatic, and 91% of contaminated individuals reported no less than three signs. The median incubation interval was three days. Beneath are probably the most generally reported signs:
- Cough (83%)
- Runny/stuffy nostril (78%)
- Fatigue/lethargy (74%)
- Sore throat (72%)
- Headache (68%)
- Muscle ache (58%)
- Fever (54%)
- Sneezing (43%)
You’ll be able to see the full symptoms breakout page here. Apparently, some signs generally related to COVID-19, akin to diminished sense of odor, weren’t broadly reported.
In line with the research, not one of the instances required hospitalizations as of December 13. “Nevertheless, we can’t exclude that vaccination has diminished the danger of great sickness,” the researchers wrote. It’s nonetheless early days provided that the variant was solely detected final month, and what we find out about omicron now’s prone to evolve and alter as quickly because the variant appears to be spreading.