Hantavirus Warning: Why Climate Change Is Reshaping Zoonotic...

CURRENT AFFAIRS | 16 MAY 2026

A recent hantavirus outbreak has prompted a wider question that goes well beyond a single pathogen: why are zoonotic spillovers — pathogens jumping from animals to humans — becoming more frequent? In an Indian Express “Explained” interview published May 15, Dr Gagandeep Kang, Director-Enterics Diagnostics Genomics and Epidemiology at Global Health, Gates Foundation, lays out the case for treating these spillovers as a structural, not episodic, problem.

Dr Kang identifies three drivers. First, deforestation and agricultural encroachment are shrinking wildlife habitat and pushing reservoir species — bats, rodents, primates — into closer contact with human settlements. Second, industrial livestock farming coupled with unplanned urban growth means animals now live cheek-by-jowl with humans, creating amplification reservoirs. Third, global travel and trade let novel pathogens cross continents within a day of jumping species.

Climate change layers on top. Aedes aegypti and Aedes albopictus — the principal vectors of dengue and chikungunya — are moving to higher altitudes and higher latitudes. Bat roost stability is disrupted by changing weather patterns. Rodents are shifting into agricultural landscapes that were previously too cold or too dry. Outbreaks of Nipah in India, Malaysia and Bangladesh and recurrent Ebola outbreaks in Central Africa show a recognisable pattern: habitat loss pushes reservoir species into human-modified landscapes.

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Dr Gagandeep Kang’s prescription: a One Health framework integrating animal, human and environmental surveillance with standardised protocols and real-time data sharing — currently a weak link, since most countries (India included) rely heavily on human clinical surveillance and underinvest in veterinary and wildlife monitoring. WHO Pandemic Accord negotiations and stronger compliance with International Health Regulations (IHR) 2005 are the multilateral half of the answer.

Constitutional & Statutory Framework

The Indian framework runs across constitutional and statutory layers. Article 47 (DPSP) directs the State to raise nutrition, standard of living and public health. Article 48A (DPSP, 42nd Amendment) directs the State to protect and improve the environment and safeguard forests and wildlife. Article 51A(g) imposes a corresponding fundamental duty on every citizen to protect the natural environment. On the statutory side, the Environment (Protection) Act, 1986, the Wildlife Protection Act, 1972 and the Biological Diversity Act, 2002 (implementing the Convention on Biological Diversity and the Nagoya Protocol) form the spine. Public health sits on the State List (Entry 6, List II), though communicable disease falls partly under Entry 29 of the Concurrent List. Globally, the WHO Constitution 1948, the IHR 2005 and the in-negotiation WHO Pandemic Accord govern surveillance and outbreak reporting. India’s National One Health Mission is being coordinated through the Principal Scientific Adviser’s office.

Why This Matters for CLAT

Public health and the environment have become heavy-rotation comprehension and GK areas in CLAT, especially after COVID-19. Be fluent on: (1) One Health — the WHO/FAO/WOAH/UNEP four-way framework; (2) IHR 2005 — the legally binding global treaty under the WHO Constitution and the differences from the proposed Pandemic Accord; (3) Articles 21 (read with the right to health under Bandhua Mukti Morcha and subsequent cases), 47, 48A, 51A(g); (4) Wildlife Protection Act 1972 and Biological Diversity Act 2002 — including the National Biodiversity Authority, State Biodiversity Boards and Biodiversity Management Committees; (5) the Convention on Biological Diversity, Nagoya Protocol and Cartagena Protocol; (6) zoonotic disease basics — Nipah (bats), Ebola, rabies, JE, Crimean-Congo Haemorrhagic Fever and now hantavirus (rodents).

Key Facts at a Glance

Expert quoted	Dr Gagandeep Kang, Director-Enterics, Gates Foundation
One Health partners	WHO + FAO + WOAH (formerly OIE) + UNEP
IHR adopted	2005, by World Health Assembly
Pandemic Accord	Under negotiation at WHA 2026
Indian Acts	EP Act 1986, WLP Act 1972, BD Act 2002
Constitutional	Articles 21, 47, 48A, 51A(g)
Vectors shifting	Aedes aegypti and Aedes albopictus moving up in altitude and latitude

Mnemonic — ONE HEALTH

One framework = humans + animals + environment. Nipah in fruit bats (Pteropus) is the Indian poster outbreak. EP Act 1986 + WLP Act 1972 + BD Act 2002 are the domestic spine. Health-related DPSPs: Articles 47 and 48A. Environmental fundamental duty: Article 51A(g). Aedes aegypti is the climate-shift indicator vector. Legally binding global treaty: IHR 2005. Treaty-in-the-making: WHO Pandemic Accord. Habitat loss is the master driver of spillover.