Saudi Press

Saudi Arabia and the world
Friday, Aug 22, 2025

19 SARS-CoV-2 mutations in India can evade antibodies, 1 causes reinfection — CSIR study

19 SARS-CoV-2 mutations in India can evade antibodies, 1 causes reinfection — CSIR study

Study suggests that N501Y, the ‘highly infectious’ Covid mutation found in UK, is present in Australia, South Africa, USA, Denmark & Brazil, and advises screening travellers from here.

At least 19 genetic variants of the SARS-CoV-2 in India have evolved to evade neutralising antibodies that the human immune system creates against the Covid-19 infection, with one of these variants having already caused a confirmed case of reinfection in the country, a study has found.

A team from CSIR Institute of Genomics and Integrative Biology (CSIR-IGIB), New Delhi; Academy of Scientific and Innovative Research (AcSIR), CSIR-HRDC, Uttar Pradesh, and Kurnool Medical College in Andhra Pradesh identified 120 ‘immune escape variants’ in SARS-CoV-2 from across the globe.

An immune escape variant of the SARS-CoV-2 is a mutation in the virus that allows it to evade the immune system.

“Our analysis suggests that a number of genetic variants associated with immune escape have emerged in global populations,” the researchers wrote in the study that is yet to be peer-reviewed.

The team compiled data from 2,65,079 SARS-CoV-2 genome sequences from a global database, apart from sequencing over 1,154 genomes in their labs.
VDO.AI

Of the 19 immune escape variants found in genomes from India, one is particular — known as S:N440K variant — was found to be in 2.1 per cent of the gene sequences in India.

This variant has a high prevalence in the state of Andhra Pradesh — where 33.8 per cent of the 272 sequenced genomes had this variant.

The team’s analysis suggests that the variant evolved within India in the recent months.

What this means for reinfections


The S:N440K variant caused a case of reinfection in a 28-year-old female healthcare worker in North India. At the time the reinfection was reported, the team had suggested that the variant possibly confers resistance to neutralising antibodies.

Asked if the new variants may cause an increase in Covid-19 reinfections, Vinod Scaria, a researcher at CSIR-IGIB and one of the authors of the study, told ThePrint, “Our body generates a number of antibodies to a virus, so one genetic variant may not completely evade all antibodies. The effect of the variant depends on proteins in the virus that the mutation affects, and also how many mutations there are in a single variant.”

Apart from the 19 identified in India, the team found 24 immune escape associated variants present in almost 70 per cent of the viruses sequenced from Australia.

The analysis also suggests that N501Y, a mutation in the Covid-19 strain from the UK that is reported to transmit faster, was present in a total of 290 genomes, including genomes from Australia, South Africa, USA, Denmark and Brazil.

India has banned flights from the UK to prevent this SARS-CoV-2 from entering the country but the paper suggests that people flying in from South Africa, USA, Denmark and Brazil also need to be monitored to prevent a second Covid-19 wave in the country.

While N501Y (the UK variant) has evidence of immune escape, the effect is not as strong as the South African lineage, which has additional variants (E484K + K417N) associated with immune escape, apart from N501Y, Scaria explained.

Viral mutations are expected


According to the researchers, viral mutations are normal for RNA viruses. When a virus multiplies inside the cells of a living organism, it creates copies of the RNA. However, the process it uses to make these copies is not perfect, and often introduces tiny errors in the sequence of bases. These errors are called genetic mutations.

The genetic material of the coronavirus is ribonucleic acid (RNA) strands. Each virus has about 26,000 to 32,000 bases or RNA “letters” in its length.

These letters — A, C, U and G — stand for adenine, cytosine, uracil and guanine, nitrogen-containing biological molecules that are the fundamental units of the genetic code. How A, C, U and G are arranged in the genetic code determines what proteins are expressed by the organism.

Unravelling the genetic code, letter-by-letter, is known as genetic sequencing.

“SARS-CoV-2 has a steady rate of mutations, and therefore it is expected that the virus accumulates mutations over time,” Scaria said.


Implications for treatments and vaccines


Scaria said that at the moment, there is no evidence to suggest that these variants may pose a special challenge for Covid-19 treatments and therapies but added that they need to be looked at in detail.

As for vaccines, Scaria pointed out that in the past, such escape variants have been identified for other commonly used vaccines — for example in Hepatitis B.

While no evidence is yet available for SARS-CoV-2, one needs to be on the lookout for such genetic variants as vaccines become commonplace, Scaria said.

“There should be an emphasis to also sequence all SARS-CoV-2 cases in vaccine trials, to understand what variants could emerge and possibly a continued genomic surveillance could identify such events early in time,” Scaria said.

Newsletter

Related Articles

Saudi Press
0:00
0:00
Close
Dogfights in the Skies: Airbus on Track to Overtake Boeing and Claim Aviation Supremacy
Tim Cook Promises an AI Revolution at Apple: "One of the Most Significant Technologies of Our Generation"
Are AI Data Centres the Infrastructure of the Future or the Next Crisis?
Miles Worth Billions: How Airlines Generate Huge Profits
Zelenskyy Returns to White House Flanked by European Allies as Trump Pressures Land-Swap Deal with Putin
Beijing is moving into gold and other assets, diversifying away from the dollar
Cristiano Ronaldo Makes Surprise Stop at New Hong Kong Museum
Zelenskyy to Visit Washington after Trump–Putin Summit Yields No Agreement
High-Stakes Trump-Putin Summit on Ukraine Underway in Alaska
Iranian Protection Offers Chinese Vehicle Shipments a Cost Advantage over Japanese and Korean Makers
Saudi Arabia accelerates renewables to curb domestic oil use
Cristiano Ronaldo and Georgina Rodríguez announce engagement
Asia-Pacific dominates world’s busiest flight routes, with South Korea’s Jeju–Seoul corridor leading global rankings
Private Welsh island with 19th-century fort listed for sale at over £3 million
Sam Altman challenges Elon Musk with plans for Neuralink rival
Australia to Recognize the State of Palestine at UN Assembly
The Collapse of the Programmer Dream: AI Experts Now the Real High-Earners
Armenia and Azerbaijan to Sign US-Brokered Framework Agreement for Nakhchivan Corridor
British Labour Government Utilizes Counter-Terrorism Tools for Social Media Monitoring Against Legitimate Critics
WhatsApp Deletes 6.8 Million Scam Accounts Amid Rising Global Fraud
Nine people have been hospitalized and dozens of salmonella cases have been reported after an outbreak of infections linked to certain brands of pistachios and pistachio-containing products, according to the Public Health Agency of Canada
Texas Residents Face Water Restrictions While AI Data Centers Consume Millions of Gallons
Tariffs, AI, and the Shifting U.S. Macro Landscape: Navigating a New Economic Regime
India Rejects U.S. Tariff Threat, Defends Russian Oil Purchases
United States Establishes Strategic Bitcoin Reserve and Digital Asset Stockpile
Thousands of Private ChatGPT Conversations Accidentally Indexed by Google
China Tightens Mineral Controls, Curtailing Critical Inputs for Western Defence Contractors
OpenAI’s Bold Bet: Teaching AI to Think, Not Just Chat
BP’s Largest Oil and Gas Find in 25 Years Uncovered Offshore Brazil
JPMorgan and Coinbase Unveil Partnership to Let Chase Cardholders Buy Crypto Directly
British Tourist Dies Following Hair Transplant in Turkey, Police Investigate
WhatsApp Users Targeted in New Scam Involving Account Takeovers
Trump Deploys Nuclear Submarines After Threats from Former Russian President Medvedev
Germany’s Economic Breakdown and the Return of Militarization: From Industrial Collapse to a New Offensive Strategy
IMF Upgrades Global Growth Forecast as Weaker Dollar Supports Outlook
Politics is a good business: Barack Obama’s Reported Net Worth Growth, 1990–2025
"Crazy Thing": OpenAI's Sam Altman Warns Of AI Voice Fraud Crisis In Banking
Japanese Prime Minister Vows to Stay After Coalition Loses Upper House Majority
President Trump Diagnosed with Chronic Venous Insufficiency After Leg Swelling
Man Dies After Being Pulled Into MRI Machine Due to Metal Chain in New York Clinic
FIFA Pressured to Rethink World Cup Calendar Due to Climate Change
"Can You Hit Moscow?" Trump Asked Zelensky To Make Putin "Feel The Pain"
Nvidia Becomes World’s First Four‑Trillion‑Dollar Company Amid AI Boom
Iranian President Reportedly Injured During Israeli Strike on Secret Facility
Kurdistan Workers Party Takes Symbolic Step Towards Peace in Northern Iraq
BRICS Expands Membership with Indonesia and Ten New Partner Countries
Elon Musk Founds a Party Following a Poll on X: "You Wanted It – You Got It!"
AI Raises Alarms Over Long-Term Job Security
Saudi Arabia Maintains Ties with Iran Despite Israel Conflict
Russia Formally Recognizes Taliban Government in Afghanistan
×