Delta variant now reported in 85 countries globally, expected to become dominant lineage: WHO
United Nations: The Delta variant, the significantly more transmissible strain of COVID-19, is expected to become a dominant lineage if current trends continue, the WHO has warned after it was reported in 85 countries and continues to be detected in more places around the world.
The COVID-19 Weekly Epidemiological Update released on June 22 by the World Health Organisation (WHO) said that globally, the variant Alpha has been reported in 170 countries, territories or areas, Beta in 119 countries, Gamma in 71 countries and Delta in 85 countries.
Delta, now reported in 85 countries globally, continues to be reported in new countries across all WHO Regions, 11 of which were newly reported in the past two weeks, the update said.
WHO said the four current 'Variants of Concern' being monitored closely Alpha, Beta, Gamma and Delta - are widespread and have been detected in all WHO regions.
The Delta variant is significantly more transmissible than Alpha variant, and is expected to become a dominant lineage if current trends continue.
The update said that India reported the highest numbers of new COVID19 cases, 441,976 over the past week (June 14-20, 2021), a 30 per cent decrease as compared to the previous week. The highest numbers of new deaths were reported from India (16,329 new deaths; 1.2 new deaths per 100,000; a 31 per cent decrease).
The South-East Asia Region reported over 600,000 new cases and over 19,000 new deaths, a 21 per cent and a 26 per cent decrease respectively compared to the previous week.
Decreasing trends in weekly case and death incidence in the Region are predominantly associated with decreases reported in India, the update said.
WHO noted that since the last detailed update on June 8, new evidence has been published on the phenotypic characteristics of the Delta variant. A study from Singapore showed that infection with Delta variant was associated with higher odds of oxygen requirement, intensive care unit (ICU) admission, or death, it said.
Further, a study in Japan "estimating the relative instantaneous reproductive number (a measure of transmission at a specific point in time) showed that the Delta variant was associated with greater transmissibility" when compared to the Alpha variant.
When compared with the variants circulating in Japan before December 2020, the relative instantaneous reproduction number for Alpha was estimated to be at 1.56 and for Delta 1.78. Overall, this study showed Delta was associated with 1.23 times higher transmissibility than Alpha, the update said.
The update also took note of two studies that have provided evidence of the effectiveness of Pfizer BioNTech-Comirnaty and AstraZeneca-Vaxzevria vaccines against the Delta variant. One study reports on the effectiveness of these vaccines against severe disease (hospitalisation) due to Delta among persons over the age of 16 years in the United Kingdom.
Vaccine effectiveness estimates against hospitalisation due to Delta and Alpha variants over 14 days post second dose was estimated to be 96 per cent and 95 per cent respectively for Pfizer BioNTech- Comirnaty and 92 per cent and 86 per cent respectively, for AstraZeneca-Vaxzevria.
Single dose effectiveness against hospitalisation over 21 days after immunisation remained high for Pfizer BioNTech-Comirnaty at 94 per cent against Delta and 83 per cent against Alpha. Effectiveness of one dose of AstraZeneca-Vaxzevria against hospitalization was similar for Delta and Alpha variants.
A second study from Scotland found that two doses of Pfizer BioNTech-Comirnaty were 83 per cent and 79 per cent effective against symptomatic disease and infection due to Delta, respectively, over 14 days after receipt of second dose in persons 15 years and older.
Together, these studies suggest moderately reduced VE at preventing symptomatic disease and infection due to the Delta variant as compared to Alpha...The studies also provide further evidence of the importance of two doses of both Pfizer BioNTech-Comirnaty and AstraZeneca-Vaxzevria in preventing hospitalisation, symptomatic disease and infection due to both Delta and Alpha variants, the update said.
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Delhi polluted owing to Aravalli, says anchor Rajat Sharma; netizens troll him
Noida: India TV editor-in-chief Rajat Sharma has drawn sharp criticism on social media following remarks he made on air attributing Delhi’s air pollution partly to its geographical location and the Aravalli hill range.
Speaking during a recent episode of his prime-time show Aaj Ki Baat, Sharma said Delhi’s geography plays a major role in trapping polluted air.
“Geographical location is the main reason. Delhi is a big city and its shape is like a bowl, surrounded by the Aravalli hills on three sides. As a result, polluted air gets trapped and cannot disperse easily. Therefore, the problem of pollution in Delhi cannot be solved in one year or in any particular season,” he said.
His comments came amid a severe deterioration in air quality in the national capital. On Sunday morning, December 21, Delhi woke up to a thick blanket of toxic smog, sharply reducing visibility and causing widespread discomfort. The overall Air Quality Index (AQI) stood at 390 around 7 a.m., placing it in the ‘very poor’ category, according to data from the Central Pollution Control Board (CPCB).
Dense fog and smog also disrupted flight operations at Delhi’s Indira Gandhi International Airport (IGIA). As many as 110 flights were cancelled, while over 370 flights were delayed due to poor visibility. Of the cancelled services, 59 were arriving flights and 51 were departures. Flight-tracking website Flightradar24 showed that departing flights faced an average delay of around 26 minutes.
Netizens troll Sharma
One user wrote on X, “Rajat Sharma is saying due to the Aravalli hills, there is air pollution in Delhi. He is defending mining and destroying the Aravalli hills like this. How can these people call themselves journalists?”
Another user accused him of political hypocrisy, comparing his earlier criticism of the Delhi government with his current remarks, and wrote, “In 2023 he blamed Arvind Kejriwal for Delhi air pollution. In 2025, he is blaming the Aravalli hills because BJP is in power. Hypocrisy = 100%, Journalism = 00%.”
Others termed the comments an example of the “godi media” narrative, alleging that geography was being blamed instead of governance, industrial emissions, vehicular pollution, construction dust, and stubble burning. “When they fail to question power or policy, they conveniently shift the blame to nature,” another post read.
“Friends, what can one even say about today’s godi media? According to them, the reason for Delhi’s pollution is that the Aravalli hills surround the city from three sides, trapping polluted air inside. Seriously? So now Sudhir Chaudhary and Rajat Sharma want us to believe that nature itself is to blame? When they fail to question power or policy, they conveniently shift the blame to geography. Apparently, it’s not years of environmental destruction or administrative failure—it’s the Aravalli hills! Does this explanation make any sense at all?,” wrote another.
What is the Aravali issue?
The controversy arises over the Union government’s revised definition of what constitutes the Aravalli hills.
The decision has drawn protests involving environmental activists across Haryana, Rajasthan, and parts of the Delhi-NCR region, who have raised concerns that the new definition could weaken protection for one of the world’s oldest mountain ranges.
Under the revised definition, an “Aravalli hill” is described as any landform in designated Aravalli districts with an elevation of 100 metres or more above local relief, while an “Aravalli range” is defined as a cluster of two or more such hills within 500 metres of each other. Activists fear this could open the door for mining, construction, and commercial activities in previously protected areas.
Environmentalists argue that the Aravalli range serves as a natural barrier against desertification, dust storms, and pollution, and plays a vital role in maintaining ecological balance in the Delhi-NCR region.
They have demanded that the entire Aravalli range be declared a fully protected area with strict conservation measures.
Meanwhile, Union Environment Minister Bhupender Yadav has stated that the new definition, accepted by the Supreme Court based on a Centre-led panel’s recommendations, would not result in any relaxation of mining norms in the Aravalli region.
Rajat Sharma is saying due to Aravalli hills there is Air pollution in Delhi. He is defending mining & destroying Aravalli hills like this
— Veena Jain (@Vtxt21) December 21, 2025
How can these people call themselves Journalists even after doing such things 🤮
pic.twitter.com/osgDAYl6Nb
🚨 2023 : Rajat Sharma was blaming Arvind Kejriwal for delhi air pollution
— Amock_ (@Amockx2022) December 21, 2025
🚨 2025 : He is blaming Aravalli Hills for delhi air pollution because BJP is in govt
Hypocrisy = 100%, Journalism = 00% 🤣 pic.twitter.com/EHCrAmAfGY
Friends, what can one even say about today’s godi media? According to them, the reason for Delhi’s pollution is that the Aravalli hills surround the city from three sides, trapping polluted air inside. Seriously? So now Sudhir Chaudhary and Rajat Sharma want us to believe that…
— The indian guy (@Ab60307) December 20, 2025
