World Environment Day 2021: Looking Back At The Last Few Outbreaks And The Role Of Environment Degradation | Environment

June 5, 2021 0 Comments

Viruses that are dangerous to humans generally come from animals like bats and rodents: Author David Quammen

  • Zoonosis is any disease that jumps from animals to humans
  • COVID-19, Nipah virus, SARS, MERS are some of the zoonotic diseases
  • The outbreak of diseases is linked to environmental destruction: Experts

New Delhi: Around nine years ago, David Quammen, Author, Spillover: Animal Infections & The Next Human Pandemic had predicted a zoonotic in his book. Zoonotic diseases or zoonosis refers to any infection or disease that jumps from a non-human/ animal to humans. In 2019, the world witnessed the outbreak of SARS-CoV-2 that causes COVID-19 disease. However, COVID-19 is not the first zoonotic disease outbreak; from Ebola, Severe acute respiratory syndrome (SARS), Middle East respiratory syndrome (MERS), to HIV, Swine Flu, Lyme disease, Rift Valley fever and others, there have been multiple outbreaks and all are zoonotic diseases. None as big as the COVID-19 pandemic the world is grappling with, but these outbreaks are an ominous sign. According to the United Nations Environment Programme (UNEP), zoonotic diseases are interlinked with ecosystem and in the recent past, human activities have destroyed many ecosystems that have resulted in the outbreak of numerous diseases and pandemics.

Also Read: Opinion: At War With The Ecology- The COVID-19 Pandemic Is The Biggest Environmental Crisis Precipitated By Humans

Urging the need to protect the ecosystem and in turn ourselves, Chandra Bhushan, CEO, International Forum for Environment, Sustainability and Technology (iFOREST) said,

I am afraid that COVID-19 is not going to be the last pandemic that humanity is going to face. In 20 years of the 21st century, we have already had three pandemics whereas in the 19th century we had just one major pandemic. So, the frequency of pandemics is increasing and it is important that we recognise it and therefore, the decade of ecosystem restoration which is the theme of this year’s environment day is very very important.

Also Read: World Environment Day 2021: COVID-19 Will Not Be The Last Pandemic, Says Environmentalist Chandra Bhushan

Earlier Zoonotic Outbreaks

Severe Acute Respiratory Syndrome (SARS)

Severe Acute Respiratory Syndrome or SARS is a type of coronavirus which is caused by the SARS-CoV virus (now known as Stars-CoV-1, as a predecessor of the current Covid-19 causing SARS-Cov-2).

According to the World Health Organisation (WHO), SARS-CoV, the virus that caused the SARS outbreak in 2003, had its ecological reservoir in bats, jumped from an animal reservoir (civet cats, a farmed wild animal) to humans and then spread between humans. The symptoms of SARS are similar to influenza symptoms and include fever, malaise, myalgia, headache, diarrhoea, and shivering.

As per the Centers for Disease Control and Prevention (CDC), the first case of atypical pneumonia was reported in the Guangdong province of southern China on November 16, 2002. It was first identified at the end of February 2003 and the outbreak lasted approximately six months as the disease spread to more than two dozen countries in North America, South America, Europe, and Asia before it was stopped in July 2003.

WHO declared SARS contained in July 2003, but a small number of SARS cases were reported until May 2004 in Singapore and Taipei. WHO claims that those cases were a result of laboratory accidents or possibly through animal-to-human transmission. There are no vaccines to prevent SARS at the given time while experimental vaccines are under development.

Also Read: Coronavirus Explained: All You Need To Know About The SARS Epidemic Of 2002

Middle East respiratory syndrome (MERS)

Middle East respiratory syndrome, commonly known as MERS, is a viral respiratory disease caused by coronavirus MERS‐CoV. MERS was first identified in Saudi Arabia in April 2012 and is a zoonotic virus, which means it is transmitted between animals and humans, and it is contractable through direct or indirect contact with infected animals.

The origins of the virus are not fully understood but according to the analysis of different virus genomes it is believed that it may have originated in bats and later transmitted to camels at some point in the distant past. Human-to-human transmission is possible, but only a few such transmissions have been found among family members living in the same household. In health care settings, however, human-to-human transmission appears to be more frequent, says WHO.

A typical symptom of MERS-CoV disease is fever, cough and shortness of breath. Pneumonia is a common finding, but not always present. Gastrointestinal symptoms, including diarrhoea, have also been reported, states WHO. At present there is no vaccine or specific treatment available to treat MERS, but as per WHO, several MERS-CoV specific vaccines and treatments are in development.

By the end of April 2021, a total of 2,574 laboratory-confirmed cases of MERS including 886 associated deaths were reported globally.

Also Read: Coronavirus Explained: What Is Middle East Respiratory Syndrome Coronavirus?

H1N1 Virus Or Swine Flu

Swine flu was the first influenza pandemic of the 21st century that occurred in 2009-2010 and was caused by an influenza A(H1N1) virus. It’s called swine flu because in the past, the people who caught it had direct contact with pigs. That changed several years ago, when a new virus emerged that spread among people who hadn’t been near pigs. Symptoms of swine flu include fever, cough, sore throat, chills, weakness and body aches. Children, pregnant women and the elderly are at risk from severe infection. The flu however, reached a post-pandemic phase in 2010, when the WHO announced that the virus will continue as a seasonal influenza virus.

However, India saw a significant swine flu outbreak in 2015, with nearly 30,000 confirmed cases and almost 3,000 deaths by March, 2015, according to the Ministry of Health and Family Welfare data. Though in May, 2015, the government declared that the outbreak was over, India like the rest of the world, witnesses swine flu cases on a seasonal bases, especially in winter.

Also Read: How Did India Fight An Earlier Pandemic The Swine Flu Outbreak In 2015?

Nipah Virus

Nipah virus (NiV) is a zoonotic virus and can also be transmitted through contaminated food or directly between people. NiV was first recognised in 1999 during an outbreak among pig farmers in Malaysia. During the first recognised outbreak in Malaysia, which also affected Singapore, most human infections resulted from direct contact with sick pigs or their contaminated tissues.

Later in 2001, the virus was recognised in Bangladesh and ever since then nearly annual outbreaks have occurred in the country. The disease has also been identified periodically in eastern India. In Bangladesh and India, consumption of fruits or fruit products (such as raw date palm juice) contaminated with urine or saliva from infected fruit bats was the most likely source of infection. It also spread directly from human-to-human through close contact with people’s secretions and excretions.

Also Read: New Study Reveals Global ‘Hot Spots’ Where New Coronaviruses May Emerge

In infected people, it causes a range of illnesses from asymptomatic (subclinical) infection to acute respiratory illness and fatal encephalitis. Infected people initially develop symptoms including fever, headaches, myalgia (muscle pain), vomiting and sore throat. This can be followed by dizziness, drowsiness, altered consciousness, and neurological signs that indicate acute encephalitis. Some people can also experience atypical pneumonia and severe respiratory problems, including acute respiratory distress. Encephalitis and seizures occur in severe cases, progressing to coma within 24 to 48 hours, says WHO.

There are currently no drugs or vaccines specific for Nipah virus infection.

Ebola Virus Disease

Ebola virus disease (EVD), formerly known as Ebola haemorrhagic fever, is a rare but severe, often fatal illness in humans. The virus is transmitted to people from wild animals (such as fruit bats, porcupines and non-human primates) and spreads in the human population through human-to-human transmission.

EVD first appeared in 1976 in two simultaneous outbreaks, one in what is now Nzara, South Sudan, and the other in Yambuku, Democratic Republic of the Congo. The latter occurred in a village near the Ebola River, from which the disease takes its name, explains WHO.

The symptoms – fever, fatigue, muscle pain, diarrhoea and others – are very much similar to other infectious diseases like Malaria and typhoid fever which makes the distinction difficult.

Within the genus Ebolavirus, six species have been identified and cases of some species are still reported in various countries like this year Guinea and the Democratic Republic of the Congo (DRC) reported cases of Zaire ebolavirus (Ebolavirus) infection. However, vaccines to protect against Ebola have been developed and have been used to help control the spread of Ebola outbreaks in Guinea and in the Democratic Republic of the Congo (DRC).

Also Read: Coronavirus Outbreak Explained: What Is The Post-Pandemic Stage? 

The Relationship Between Human Health And Environment

David Quammen is not surprised by the way zoonotic has hit human beings. There are untold numbers of viruses living in our rich and diverse ecosystem. Every species of animal has its own viruses, said Mr Quammen while talking to NDTV. Explaining how these viruses leap into a human body, Mr Quammen said,

When we go into that ecosystem to bring out fossil fuels or kill animals or bring wood and for other purposes, we cause disruption, expose ourselves and become vulnerable to the viruses. It is then the viruses spillover. Viruses are more dangerous than any other kind of pathogens in this day and age. Viruses can thrive and grow in cells. Viruses that are dangerous to humans generally come from animals like bats and rodents.

Also Read: UN Chief Calls For A Global Partnership To Address COVID-19, Climate Change And Achieve Sustainable Development Goals

NDTV also spoke with Inger Andersen, UN Under-Secretary-General and Executive Director of the UNEP to understand the link between environmental health and human health. Ms Andersen warned that because of the biodiversity loss that is happening on a large scale, over 60 per cent of non-infectious disease and about 75 per cent of emerging infectious diseases are zoonotic. She said,

Now, we have to understand that to a large extent, human activity is largely to blame. We have intensified agriculture, we have fragmented nature, we have expanded infrastructure, we have extracted resources at the expense of these wild remote bases. Factory farms are linked to 25 per cent of infectious diseases in humans and travel and transport and food supply chains have erased what were borders and distances between some of these diseases and their appearance.

In a nutshell, disruption of biodiversity and exploitation of the ecosystem is exposing us to life-threatening viruses and according to the experts, if we don’t act now, we will face more pandemics in the future. Therefore, this World Environment Day will mark the launch of the ‘UN Decade Of Ecosystem Restoration’, highlighting the need to take steps to restore nature and planet earth.

This decade is designed to connect, empower and build political momentum; generate scientific research and create a groundswell of support for actions on ecosystem restoration. A decade might seem like a long time, but scientists say that the next 10 years would count most in the fight to avert climate change and biodiversity loss, says Ms Andersen.

Also Read: World Environment Day: 75% Of Emerging Infectious Diseases Are Zoonotic, Caused By Biodiversity Loss, Warns UN Environment Programme Official

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 193 countries. The total confirmed cases worldwide are 17,33,05,286 and 37,28,796 have died; 5,84,65,841 are active cases and 11,11,10,649 have recovered as on June 7, 2021 at 3:39 am.


2,89,09,975 1,00,636Cases


2,71,59,180 1,74,399Recovered

3,49,186 2,427Deaths

In India, there are 2,89,09,975 confirmed cases including 3,49,186 deaths. The number of active cases is 14,01,609 and 2,71,59,180 have recovered as on June 7, 2021 at 2:30 am.

State Details

State Cases Active Recovered Deaths

58,31,781 12,557

1,88,384 2,494

55,43,267 14,433

1,00,130 618


26,95,523 12,209

2,54,526 13,770

24,09,417 25,659

31,580 320


26,33,082 14,672

1,61,065 6,984

24,62,071 21,429

9,946 227

Tamil Nadu

22,37,233 20,421

2,44,289 13,174

19,65,939 33,161

27,005 434

Andhra Pradesh

17,58,339 8,976

1,23,426 4,682

16,23,447 13,568

11,466 90

Uttar Pradesh

16,98,389 1,037

17,944 1,494

16,59,209 2,446

21,236 85


14,29,244 381

5,889 842

13,98,764 1,189

24,591 34

West Bengal

14,26,132 7,002

35,454 8,987

13,74,419 15,882

16,259 107


9,80,575 999

23,280 1,615

9,44,078 2,589

13,217 25


9,46,346 904

18,575 2,975

9,19,115 3,854

8,656 25


8,16,234 848

18,008 2,079

7,88,293 2,915

9,933 12


8,13,096 7,002

70,726 398

7,39,376 7,358

2,994 42

Madhya Pradesh

7,85,196 735

10,103 1,241

7,66,756 1,934

8,337 42


7,62,291 654

9,097 877

7,44,482 1,483

8,712 48


7,13,117 920

8,708 920

6,99,028 1,799

5,381 41


5,91,170 1,436

27,016 2,192

5,60,776 3,614

3,378 14


5,79,560 1,563

22,160 2,294

5,42,324 3,790

15,076 67


4,34,942 2,228

50,865 1,885

3,80,419 4,076

3,658 37


3,41,218 293

5,686 553

3,30,478 838

5,054 8


3,34,024 446

16,125 1,180

3,11,200 1,591

6,699 35

Jammu And Kashmir

3,00,490 1,440

26,741 1,682

2,69,675 3,099

4,074 23

Himachal Pradesh

1,95,099 357

8,361 1,123

1,83,441 1,462

3,297 18


1,59,393 403

7,154 1,062

1,49,479 1,449

2,760 16


1,09,079 640

8,270 513

99,181 1,138

1,628 15


60,659 74

833 92

59,054 162

772 4


55,469 235

5,921 560

48,984 789

564 6


55,230 823

9,184 168

45,165 646

881 9


38,718 488

5,583 214

32,471 690

664 12

Arunachal Pradesh

29,336 223

3,593 160

25,618 381

125 2


22,773 77

4,732 87

17,615 160

426 4


19,197 50

1,089 81

17,913 131



17,111 340

4,306 88

12,532 247

273 5


13,679 112

3,279 84

10,345 194

55 2

Dadra And Nagar Haveli

10,394 7

129 7




8,737 70

1,005 155

7,694 225


Andaman And Nicobar Islands

7,119 14

103 4

6,894 18



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