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Symptoms From Omicron Infection Last Two Days Less Than Delta: Lancet Study

The research, published in The Lancet journal, used data from vaccinated people who kept a smartphone log of their COVID-19 symptoms after breakthrough infections

Symptoms From Omicron Infection Last Two Days Less Than Delta: Lancet Study
There was a lower rate of hospital admission during Omicron prevalence than during delta prevalence, according to the researchers
Highlights
  • For the research, eligible participants were aged 16–99 years
  • Participants had received at least 2 doses of vaccine, were symptomatic
  • Sore throat was more common during Omicron than Delta prevalence: Research

London: Disease caused by the Omicron variant of coronavirus is on average two days shorter than the Delta variant, according to a large observational study of vaccinated people in the UK. The research, published in The Lancet journal on Thursday, used data from vaccinated people who kept a smartphone log of their COVID-19 symptoms after breakthrough infections. Eligible participants were aged 16–99 years, and had received at least two doses of COVID-19 vaccine, were symptomatic, and logged a positive symptomatic test for SARS-CoV-2.

Also Read: WHO Busts ‘Misinformation’ Causing ‘Confusion’, Lists 3 Misleading Claims Around COVID-19 Pandemic And Omicron

The researchers at King’s College London, UK, collected data from participants who were self-reporting test results and symptoms in the ZOE COVID app.

The duration of acute symptoms was shorter during Omicron prevalence than during Delta prevalence, with the average presentation of Omicron being 2 days shorter than that of Delta, the authors of the study noted.

“Furthermore, a third dose of vaccine was associated with a greater reduction in symptom duration in participants infected during Omicron prevalence compared with those infected during Delta prevalence,” they said.

Between June 1, 2021, and January 17, 2022, the researchers identified 63,002 participants who tested positive for SARS-CoV-2 and reported symptoms in the ZOE app.

These patients were matched 1:1 for age, sex, and vaccination dose, across two periods.

Also Read: BA.2 Sub-Variant Of Omicron Is More Transmissible Than BA.1, But Not More Severe, Says WHO

The researchers found that loss of smell was less common in participants infected during Omicron prevalence than during Delta wave.

Sore throat was more common during Omicron prevalence than during Delta prevalence, they said.

There was a lower rate of hospital admission during Omicron prevalence than during delta prevalence, according to the researchers.

The prevalence of symptoms that characterise an Omicron infection differs from those of the Delta variant, apparently with less involvement of the lower respiratory tract and reduced probability of hospital admission, they said.

Our data indicate a shorter period of illness and potentially of infectiousness which should impact work–health policies and public health advice, the researchers said.

However, this might not be the case in unvaccinated individuals, they added.

Also Read: Dangerous To Assume Omicron Will Be The Last Variant; We Can End The Acute Phase Of COVID-19 This Year: WHO Chief

(This story has not been edited by NDTV staff and is published from a syndicated feed.)

NDTV – Dettol have been working towards a clean and healthy India since 2014 via the Banega Swachh India initiative, which is helmed by Campaign Ambassador Amitabh Bachchan. The campaign aims to highlight the inter-dependency of humans and the environment, and of humans on one another with the focus on One Health, One Planet, One Future – Leaving No One Behind. It stresses on the need to take care of, and consider, everyone’s health in India – especially vulnerable communities – the LGBTQ populationindigenous people, India’s different tribes, ethnic and linguistic minorities, people with disabilities, migrants, geographically remote populations, gender and sexual minorities. In wake of the current COVID-19 pandemic, the need for WASH (WaterSanitation and Hygiene) is reaffirmed as handwashing is one of the ways to prevent Coronavirus infection and other diseases. The campaign will continue to raise awareness on the same along with focussing on the importance of nutrition and healthcare for women and children, fight malnutrition, mental wellbeing, self care, science and health, adolescent health & gender awareness. Along with the health of people, the campaign has realised the need to also take care of the health of the eco-system. Our environment is fragile due to human activity, which is not only over-exploiting available resources, but also generating immense pollution as a result of using and extracting those resources. The imbalance has also led to immense biodiversity loss that has caused one of the biggest threats to human survival – climate change. It has now been described as a “code red for humanity.” The campaign will continue to cover issues like air pollutionwaste managementplastic banmanual scavenging and sanitation workers and menstrual hygiene. Banega Swasth India will also be taking forward the dream of Swasth Bharat, the campaign feels that only a Swachh or clean India where toilets are used and open defecation free (ODF) status achieved as part of the Swachh Bharat Abhiyan launched by Prime Minister Narendra Modi in 2014, can eradicate diseases like diahorrea and the country can become a Swasth or healthy India.

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