Hospitalization Risk Doubles with Delta Variant, Research Findings


People infected with the highly contagious Delta variant are twice as likely to be hospitalized as those infected with the Alpha variant. great new english work.

The study, published Friday in The Lancet Infectious Diseases, is an analysis of more than 40,000 coronavirus infections in the UK. Adds to the evidence suggesting that delta may cause more serious disease than other variants.

Less than 2 percent of infections occur in fully vaccinated people, and there isn’t enough data to draw firm conclusions about the risks of hospitalization, especially in this group, the researchers said.

“The main takeaway is that if you have an unvaccinated or only partially vaccinated population, the Delta outbreak can place a greater burden on hospitals and healthcare than an Alpha outbreak,” said Anne Presanis, a senior statistician. University of Cambridge and one of the study’s lead authors.

Delta variantThe virus, first detected in India, is roughly twice as contagious as the original virus and 60 percent more contagious than the virus. alpha variantwas first described in England.

In the new study, researchers analyzed health data from people who tested positive for the virus in the UK between 29 March and 23 May as Delta spread across the country. Seventy-four percent of people were unvaccinated, 24.2 percent partially vaccinated, and 1.8 percent fully vaccinated.

Genetic sequencing confirmed that 80 percent of study participants were infected with the Alpha variant, while 20 percent were infected with Delta.

The researchers found that the risk of hospitalization for both groups was small. Only 2.2 percent of people with alpha and 2.3 percent of people with Delta were hospitalized within two weeks of testing positive for the virus.

But people infected with the Delta variant were younger, on average. When the researchers adjusted for age and other factors known to affect the severity of the disease, they found that the risk of hospitalization was more than doubled when Delta caused the infection.

When the researchers split the data by vaccination status, they confirmed that Delta doubled the risk of hospitalization for those who were not vaccinated or who had received their first dose less than three weeks ago. The fully vaccinated group was too small to be rigorously analyzed on its own, the researchers said.

“We already know that vaccination provides excellent protection against Delta, and as this variant accounts for over 98 percent of Covid-19 cases in the UK, it is vital that those who have not received two doses of the vaccine do so as soon as possible,” said the lead author and Public Health England. Dr. Gavin Dabrera, an epidemiologist at .


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