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COVID-19 Outbreak Explained: What Is Delta Plus Variant Of Coronavirus And Why Is It A Variant Of Concern?

According to the Ministry of Health and Family Welfare, the cases of Delta Plus variant have been reported in 12 states so far; here is all you need to know about this new variant

COVID-19 Outbreak Explained: What Is Delta Plus Variant Of Coronavirus And Why Is It A Variant Of Concern?

New Delhi: According to the Ministry of Health and Family Welfare (MoHFW), the Delta Plus, much like the Delta strain of coronavirus that has spread to 85 countries, is highly infectious and fast-spreading. In India, the new strain has been reported in 12 states, while globally, over 12 countries have detected Delta Plus cases. As the Delta Plus infection cases rise in the country, the government labelled the new strain as the ‘Variant of Concern’ on June 22. A variant of concern is characterised by increased infectivity, transmissibility or resistance to vaccines and treatment, according to the World Health Organisation (WHO). NDTV speaks with experts to learn about the new strain, the risks involved and whether it can lead to a third coronavirus wave in the country.

Also Read: COVID-19 Virus Highly Adapted To Infect Human Cells: Study

Delta Plus Variant, A Mutation In The Delta Variant

The new Delta Plus variant is technically named B.1.617.2.1 or AY.1 and has been formed due to a mutation called K417N in the Delta or B.1.617.2 variant. According to experts, the mutation is in the spike protein of SARS-COV-2, which helps the virus enter and infect human cells.

How Dangerous Is The New Delta Plus Strain?

According to the Union Health Ministry, on the basis of learnings so far, the Delta Plus shows three characteristics- increased transmissibility, stronger binding to receptors of lung cells and potentially reduced monoclonal antibody response. However, Dr Randeep Guleria, Director of All India Institute Of Medical Sciences (AIIMS), New Delhi said that currently, the number of cases of Delta plus variant is not enough to judge the significance of this variant in terms of it causing severe disease or high mortality or resistance to monoclonal antibodies. While talking about the risk of increased severity among cases due to the delta plus variant, Dr Anurag Agrawal, Director of CSIR Institute of Genomics and Integrative Biology said,

By now we know all the cases that been found to be infected by the Delta Plus variant and we have not seen severe disease.

Dr Rahul Pandit, member, Maharashtra Covid Task Force, Director – Critical Care Fortis Hospitals Mumbai, however, has raised some concerns over the potential risks from the Delta Plus variant. He said,

My concerns are, is the infectivity different, is the virulence (or how fast the virus spreads) different, and how efficient are the present vaccines against the virus. We are yet to know about this with evidence. Symptoms wise, we know that it is causing more conjunctivitis, sore throat, prolonged taste loss and smell loss. The concern is also that if the receptor-binding site of the virus gets stronger which is where the mutation is happening then it may actually increase the virus’ binding to the lungs and that may cause a severe form of infection. But whether it is true or not is yet to be known.

Dr S.K. Sarin, Director, Institute of Liver and Biliary Sciences (ILBS), Delhi who is also a member of the national task force for COVID-19 said that symptomatology of the new virus needs to be studied. He said,

Like in case of Delta variant, people were taking longer to become negative and get discharged from the hospital. So longer virus persistence, delayed resolution, more severe disease and more lung injury, cytokine storm, diarrohea, are some of the risks. Also, we need to see whether the vaccine will be efficient. There might not be a severe infection, but the infection cannot be totally prevented.

Dr Sarin also said that it is highly likely that breakthrough infections increase because of the Delta Plus variant. He said,

All these viruses survive by immune escape- they will try to fool your body in order to multiply in your body. So, there is a constant fear that these viruses will breakthrough the immunity that you have of the immunity that the vaccine has provided. So, this will guide us towards the next step. Do we need a booster dose? And these trials need to be done very rapidly.

As far as the resistance to treatment is concerned, Dr Agarwal said that already very few patients in the country undergo antibody monoclonal treatment, so it is still too soon to say that it is completely resistant to the treatment.

Also Read: Vaccination Needs To Be Boosted Massively As The Contagious Delta Variant Of COVID-19 Continues To Spread, Says Epidemiologist Dr Eric Feigl-Ding

Can Delta Plus Variant Lead To A Third Wave?

Whether the Delta Plus variant could trigger the third wave, Dr Agrawal, said that as of now the data is not enough to provide any evidence about the third wave. He said,

For every number, we must know the denominator. My institute has sequenced more than 3,500 samples from Maharashtra in the month of June covering samples from April and May. So, we can see that the strain is very much there but constitute less than on per cent of what has been sequenced in the given run. Even in the areas where the number is higher, it is still not very high.

However, Dr Agarwal emphasised that any sub-lineage of the Delta variant is a variant of concern and added that currently, it is important to worry about the second wave not ending than the onset of the third wave.
Dr Guleria underlined that even though the numbers are less, there is still a need to be vigilant. He said,

It is important to remain vigilant because we should not be lagging behind in terms of actions that we need to take, incase this variant becomes more infectious. If we go back to the second wave, there were suggestions that a new variant was emerging but by the time we got a hold of it, the variant had gone out of control, and we had a huge surge in the number of cases. To have more idea about the new variant, we need to observe it for few more days while being cautious.

Delta Plus: Prevention

The Union Health Ministry has recommended that areas, where Delta plus variant is found, should enhance their public health response by focusing on surveillance, enhanced testing, quick contact-tracing and priority vaccination. Speeding up the rate of vaccinations manifolds is also a strategy the experts urge central and state governments to follow. Dr Pandit said that there needs to be a multi-level approach. He said,

There needs micro containing and putting the clusters of infections into isolation zone and do increased testing. Track and treat the contact as well as the patient. Another thing that is extremely important now is to detect the more cases soon which means that even more genome sequencing needs to be done in the districts of concern.

Experts also said that the target is to stop the virus from mutating further which means that the virus should not get a host and thus the same precautions that were necessary from the earliest days of the pandemic remain crucial in the face of the Delta-plus variant. Hence, masking, handwashing and social distancing should be constantly practiced at the individual level.

Also Read: Third Wave Of COVID-19 Can Be Stopped If Preventive Measures Are Followed: Dr. V. K. Paul, NITI Aayog Member

NDTV – Dettol Banega Swasth India campaign is an extension of the five-year-old Banega Swachh India initiative helmed by Campaign Ambassador Amitabh Bachchan. It aims to spread awareness about critical health issues facing the country. 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 highlights the importance of nutrition and healthcare for women and children to prevent maternal and child mortality, fight malnutrition, stunting, wasting, anaemia and disease prevention through vaccines. Importance of programmes like Public Distribution System (PDS), Mid-day Meal Scheme, POSHAN Abhiyan and the role of Aganwadis and ASHA workers are also covered. 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 become a Swasth or healthy India. The campaign will continue to cover issues like air pollutionwaste managementplastic banmanual scavenging and sanitation workers and menstrual hygiene


Coronavirus has spread to 195 countries. The total confirmed cases worldwide are 22,70,55,138 and 46,70,253 have died; 18,97,86,461 are active cases and 3,25,98,424 have recovered as on September 17, 2021 at 5:36 am.


3,33,81,728 34,403Cases
3,25,98,424 37,950Recovered
4,44,248 320Deaths
In India, there are 3,33,81,728 confirmed cases including 4,44,248 deaths. The number of active cases is 3,39,056 and 3,25,98,424 have recovered as on September 17, 2021 at 2:30 am.

State Details

State Cases Active Recovered Deaths

65,11,525 3,595

52,893 310

63,20,310 3,240

1,38,322 45


44,46,228 22,182

1,86,754 4,559

42,36,309 26,563

23,165 178


29,65,191 1,108

16,202 282

29,11,434 808

37,555 18

Tamil Nadu

26,40,361 1,693

16,756 120

25,88,334 1,548

35,271 25

Andhra Pradesh

20,34,786 1,367

14,708 105

20,06,034 1,248

14,044 14

Uttar Pradesh

17,09,628 23

193 11

16,86,549 11

22,886 1

West Bengal

15,59,567 707

8,025 25

15,32,922 725

18,620 7


14,38,373 28

409 5

14,12,880 22

25,084 1


10,18,298 580

5,335 105

10,04,845 681

8,118 4


10,04,988 31

352 2

9,91,077 29



9,54,230 4

103 1

9,45,173 5



8,25,677 22

149 0

8,15,446 22


Madhya Pradesh

7,92,374 7

119 5

7,81,738 12



7,70,697 9

327 8

7,60,562 17



7,25,864 12

72 6

7,16,134 6



6,62,785 259

5,282 43

6,53,603 301

3,900 1


6,01,180 30

314 11

5,84,399 38

16,467 3


5,97,074 468

5,381 15

5,85,914 479

5,779 4


3,48,102 6

102 8

3,42,867 14



3,43,330 20

284 12

3,35,657 32


Jammu And Kashmir

3,27,466 170

1,421 72

3,21,630 98


Himachal Pradesh

2,16,430 127

1,568 82

2,11,215 206

3,647 3


1,75,183 95

699 1

1,71,195 96



1,25,170 107

963 63

1,22,380 42

1,827 2


1,17,913 216

2,614 7

1,13,478 219

1,821 4


83,787 31

427 26

82,553 56

807 1


78,958 229

1,804 140

75,784 86

1,370 3


76,591 1,121

13,888 85

62,449 1,202

254 4


65,168 4

31 2

64,319 2


Arunachal Pradesh

53,990 47

536 9

53,183 56



30,802 64

775 28

29,648 36



30,763 32

505 14

29,610 44

648 2


20,631 6

41 1

20,383 5


Dadra And Nagar Haveli


5 0





4 0



Andaman And Nicobar Islands

7,595 3

15 2

7,451 1


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1 Comment

1 Comment

  1. Lycos ceramic

    July 5, 2021 at 12:48 pm

    nice blog

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