The delta variant: The most formidable version of Covid yet?

India has experienced a surge in cases of coronavirus disease 2019 (Covid-19) since late March 2021

Written by sidra Gul

India has experienced a surge in cases of coronavirus disease 2019 (Covid-19) since late March 2021, reaching more than 400,000 cases and 4000 deaths reported each day in early May 2021.1 This increase has resulted in hospital services becoming overwhelmed and in a scarcity of oxygen supplies.2 Although only a small proportion of samples have been sequenced, B.1.617 lineages of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) have dominated. The B.1.617.2 (delta) variant was first detected in India in December 2020 and became the most commonly reported variant in the country starting in mid-April 2021.1 As of May 19, 2021, the variant had been detected in 43 countries across six continents in GISAID (originally an acronym for global initiative on sharing avian influenza data but more recently a site for compiling sequence data on viruses, particularly influenza and coronaviruses, that threaten to cause a pandemic).3 In the United Kingdom, a rapid increase in cases with this variant has been seen associated with travel from India and with community transmission.

In the United Kingdom, vaccination was initially prioritized for older adults, caregivers, and health and social care workers, with subsequent rollout to persons in clinical risk groups and younger-age cohorts.5 At an early stage of the rollout, a policy decision, based on advice from the Joint Committee on Vaccination and Immunisation, was made to use an extended administration interval of up to 12 weeks in order to maximize the number of vulnerable persons receiving the first dose during the second wave of the pandemic in the context of constraints on vaccine supply and delivery.

It has recently been described by the World Health Organization (WHO) as the “most transmissible of the variants identified so far”.Nepal was particularly badly hit, with a dramatic surge in infections overwhelming the local health infrastructure.Afghanistan’s cases were at an all-time high in June and the country’s health minister, Wajid Majrooh, said that 60% of cases in the capital, Kabul, were due to the Delta variant.The WHO has also recently reported rising case numbers in Indonesia, Bangladesh and Thailand.

As with previous variants, the delta variant has spread to many countries across the world, including, most notably, the United Kingdom, where it’s now responsible for around 99 percent of new cases.The United States first announced it had a confirmed COVID-19 case with the delta variant in March this year. It’s now the dominating variant nationwide, making up 83 percent of all new infections in the country.

COVID-19 cases are quickly rising yet again in the United States. The average number of daily COVID-19 cases is more than 40,000, according to data from the Centers for Disease Control and Prevention (CDC).This rise has been attributed, in part, to the delta variant being an estimated 60 percentTrusted Source more transmissible than the alpha variant, according to recent research.Additionally, areas with low vaccination rates are more likely to see a surge in infections.

The Delta variant, also known as B.1.617.2, can spread more easily, according to the CDC. The strain has mutations on the spike protein that make it easier for it to infect human cells. That means people may be more contagious if they contract the virus and more easily spread it to others. It is now the dominant strain in the U.S.

In fact, researchers have said that the Delta variant is about 50% more contagious than the Alpha variant, which was first identified in the U.K., according to The Washington Post. Alpha, also known as B.1.1.7, was already 50% more contagious than the original coronavirus first identified in China in 2019.

Public health experts estimate that the average person who gets infected with Delta spreads it to three or four other people, as compared with one or two other people through the original coronavirus strain, according to Yale Medicine. The Delta variant may also be able to escape protection from vaccines and some COVID-19 treatments, though studies are still ongoing.

The Delta Plus variant, also known as B.1.617.2.1 or AY.1, is considered a “subvariant” of the Delta version, according to CBS News. It has a mutation that allows the virus to better attack lung cells and potentially escape vaccines.First identified in India, Delta Plus has now been found in the U.S., U.K., and nearly a dozen other countries. India has labeled it a variant of concern, but the CDC and WHO haven’t.

The symptoms are similar to those seen with the original coronavirus strain and other variants, including a persistent cough, headache, fever, and sore throat.At the same time, COVID-19 patients in the U.K. have reported that some symptoms are slightly different for Delta, according to data from the ZOE COVID Symptom Study. Cough and loss of smell seem to be less common. Headache, sore throat, runny nose, and fever seem to be more common

People who haven’t been fully vaccinated against COVID-19 are most at risk, Yale Medicine reported. In the U.S., communities with low vaccination rates have seen a jump in cases, particularly in Midwest and Southern states such as Missouri and Arkansas. Outbreaks have also been found in Mountain states, such as Wyoming.Kids and younger adults who haven’t been vaccinated may be susceptible as well. In the U.K., children and unvaccinated adults under age 50 were 2.5 times more likely to become infected with Delta, according to a recent study published by Imperial College London.

Scientists are still tracking the data to determine how deadly it is. Based on hospitalizations in the U.K., the Delta variant does seem to be more likely to lead to hospitalization and death, particularly among unvaccinated people, according to a recent study published in The Lancet.

Sidra Gul is an ardent reader and a vivid writer, Sidra likes to breathe life into everything she pens down