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PT Health Watch: Common cancer risk factors that should not be ignored

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Cancer is one of the leading causes of death worldwide, but health experts say many cancer cases are linked to preventable risk factors.

The World Health Organisation (WHO) estimates that cancer caused nearly 10 million deaths globally in 2024, accounting for almost one in six deaths worldwide. It says about 38 per cent of cancers can currently be prevented by avoiding known risk factors and implementing evidence-based prevention strategies.

Cancer continues to affect thousands of families in Nigeria every year. According to WHO, an estimated 130,000 new cancer cases were diagnosed in 2022, with 80,000 deaths.

While cancer can result from several factors, including genetic changes, age and environmental exposures, some established risks are linked to infections, substances and behaviours that can be prevented.

In a recent health awareness video, Nigerian physician and health communicator, Chinonso Egemba, popularly known as Aproko Doctor, highlighted some of these risks, including hepatitis B, aflatoxin, tobacco, alcohol and human papillomavirus (HPV).

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Hepatitis B

According to Aproko Doctor, hepatitis B is particularly dangerous because it can remain in the body without obvious symptoms while damaging the liver.

“When it goes untreated and untested, it’s a virus that starts attacking your liver. Many Nigerians currently are living with it right now, and many of them don’t know because it can sit quietly inside your body for years without a single symptom,” he said.

His warning is supported by WHO, which says chronic hepatitis B infection can cause cirrhosis and liver cancer.

WHO estimates that 240 million people were living with chronic hepatitis B globally in 2024, with the infection contributing to about 1.1 million deaths, mainly from cirrhosis and hepatocellular carcinoma, the most common type of primary liver cancer.

Hepatitis B is preventable through vaccination. WHO recommends hepatitis B vaccination as an important measure for preventing infection and its long-term complications.

Aflatoxin in food

Aproko Doctor warned that the cancer risk can begin with improperly stored food.

“Aflatoxin is basically a poison produced by fungus,” he explained, noting that it can contaminate foods such as grains and groundnuts when they are poorly stored.

According to WHO, Aflatoxins are a group of poisonous mycotoxins produced by certain moulds (Aspergillus species) that contaminate food crops and pose severe health risks like liver cancer. They are toxins produced by certain moulds and can contaminate crops including maize, sorghum, rice and groundnuts. Exposure to aflatoxins can cause liver cancer.

WHO advises discarding food that appears mouldy, discoloured, or shrivelled because mycotoxins can penetrate beyond the visibly affected part.

Aflatoxin exposure can also be particularly dangerous in people infected with hepatitis B. The WHO/FAO Joint Expert Committee on Food Additives says hepatitis B infection is an important contributor to the ability of aflatoxins to cause liver cancer.

This means food storage and handling can also form part of cancer prevention, particularly in communities where grains and other foods are stored for long periods in warm or damp conditions.

Tobacco smoking

Tobacco remains one of the most established cancer risks.

“Smoking generally, as long as you light it with fire and put it on your body, increases the risk of cancer, especially tobacco smoke,” Aproko Doctor said.

He added that the danger was not limited to lung cancer because tobacco smoke contains cancer-causing chemicals that can damage cells throughout the body.

WHO says tobacco smoke contains more than 7,000 chemicals, at least 69 of which are known to cause cancer. Tobacco use is the world’s single greatest avoidable risk factor for cancer mortality.

Smoking can cause cancers of the lung, mouth and throat, oesophagus, bladder, kidney, liver, pancreas, stomach, colon and rectum, cervix and blood, among others.

Alcohol

Alcohol is another established cancer risk. WHO confirms that alcohol consumption increases the risk of several cancers, including cancers of the mouth, throat, oesophagus, liver, colorectum and breast.

WHO also says no level of alcohol consumption can be considered risk-free in relation to cancer.

“The more alcohol you drink, the higher the risk. However, how much and how fast the risk from drinking alcohol increases differs by cancer type,” it noted.

The global body explained that alcohol increases the likelihood of developing certain cancers, with the risk influenced by the amount consumed and other factors.

Human papillomavirus

According to Aproko Doctor, the virus is common, and some types can cause cancer, particularly cervical cancer.

“In women, this particular HPV is responsible for cervical cancer,” he noted.

According to the WHO, persistent infection with high-risk HPV types causes nearly 99 per cent of all cervical cancer cases. HPV is also associated with cancers of the vulva, vagina, anus, penis and mouth and throat.

Although HPV infection is very common, not everyone infected with the virus will develop cancer. WHO says about 90 per cent of HPV infections are controlled naturally by the body, while persistent infection with high-risk types can lead to cancer.

WHO recommends a complete three-step strategy to stop cervical cancer through vaccination, screening, and treatment.

READ ALSO: WHO restricts Ervebo use in Bundibugyo outbreak

Preventing Cancer

A 2026 global analysis by WHO and its International Agency for Research on Cancer (IARC) estimated that 37 per cent of all new cancer cases diagnosed globally in 2022, about 7.1 million cases, were linked to preventable causes.

Tobacco was the leading preventable cause, accounting for 15 per cent of all new cancer cases, followed by cancer-causing infections at 10 per cent and alcohol at three per cent.

WHO recommends avoiding tobacco, reducing or avoiding alcohol, maintaining a healthy weight, eating a healthy diet, engaging in regular physical activity and receiving recommended vaccinations against cancer-causing infections such as hepatitis B and HPV.

As Aproko Doctor noted, understanding the risks is an important first step.“Don’t let anybody deceive you. Say no to smoking in any form,” he said.


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FG provides 80,906 free caesarean sections, reports 22% drop in obstetric emergency deaths

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The Nigerian government says it has provided 80,906 free caesarean sections under its emergency obstetric care programme, alongside a 22 per cent reduction in deaths from obstetric emergencies in participating health facilities.

The Coordinating Minister of Health and Social Welfare, Muhammad Pate, disclosed this on Tuesday at the 2026 Nigeria Health Sector Joint Annual Review (JAR) in Abuja.

Mr Pate said nearly 100,000 free emergency obstetric and newborn healthcare services had been delivered since the programme was announced two years ago.

According to him, the services included 80,906 caesarean sections, approximately 9,100 newborn services and 6,059 repairs for vesicovaginal fistula, a condition that can cause continuous leakage of urine following childbirth injuries.

“Two years after we announced the free emergency obstetric care programme, almost 100,000 services have been delivered,” he said.

“Deaths from obstetric emergencies have fallen by 22 per cent in participating facilities. These are among the highest-risk maternal cases.”

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The programme is part of the government’s efforts to reduce preventable maternal and newborn deaths by improving access to emergency healthcare, particularly for women who cannot afford treatment.

A caesarean section is a surgical procedure used to deliver a baby through an incision in the abdomen and uterus, typically when healthcare providers determine it’s safer for the mother, baby, or both.

Despite its necessity in many cases, the high cost of a C-section in Nigeria has long been a major barrier, preventing many women from accessing this critical care during childbirth.

Expansion of emergency maternal healthcare

Mr Pate said the government had also strengthened emergency obstetric and newborn healthcare services by providing equipment to more than 300 secondary healthcare facilities and over 500 primary healthcare centres (PHCs).

He explained that the secondary facilities were equipped to provide comprehensive emergency obstetric and newborn care, while the PHCs were supported to deliver basic emergency services.

“The facilities, staff and referral services must work together if we are to reduce preventable deaths,” he said.

The minister also highlighted progress under the Maternal and Newborn Mortality Reduction Innovation Initiative (MAMII), which targets communities with high maternal and newborn mortality burdens.

He said the initiative had mapped and linked 750,000 pregnant women to functional health facilities.

According to him, emergency transport services operated in 171 of the 172 local government areas covered by MAMII and transported 104,566 women and newborns.

Across the wider referral network, he said 1,053 transport assets and 9,050 community drivers had transported 168,571 patients.

“These arrangements are connecting women and newborns to the care they need,” he said.

Free caesarean sections

In November 2024, PREMIUM TIMES reported that the federal government had announced free caesarean sections for eligible pregnant women as part of efforts to reduce maternal and newborn deaths.

The intervention was initially piloted in August 2024 in four healthcare facilities in Kano and Akwa Ibom states before expanding to other locations.

By April 2025, Mr Pate announced that more than 4,000 women had benefited from free caesarean sections through the programme.

During the same period, the National Health Insurance Authority (NHIA) disclosed that the intervention had commenced in more than 100 hospitals across Nigeria’s six geopolitical zones.

NHIA explained that eligible women who could not afford the procedure could receive it free of charge after an assessment by the hospital’s social welfare team.

It said beneficiaries were required to provide their National Identification Number, which could be presented before or after admission.

The programme involves federal, state, private and faith-based hospitals, with the NHIA coordinating payments for eligible services.

In September 2026, the government also introduced incentives under MAMII to encourage greater use of maternal and newborn healthcare services and address barriers preventing women from receiving timely care.

Maternal deaths remain a concern

Despite the reported improvements, maternal and newborn deaths remain major public health concerns in Nigeria.

At the review, the National Coordinator of the Sector-Wide Approach Coordination Office, Muntaqa Umar-Sadiq, identified shortages of skilled health workers and gaps in Comprehensive Emergency Obstetric and Newborn Care (CEmONC) services as challenges affecting healthcare delivery.

READ ALSO: Maternal case fatality rate drops by 60% in supported health facilities – FG

“Investments in CEmONC facilities, infrastructure and equipment must be matched with adequate numbers of skilled health workers. We must also modernise our tertiary health institutions,” he said.

Mr Umar-Sadiq stressed the need to improve the deployment and retention of skilled health workers, particularly in facilities providing emergency obstetric and newborn care.

The 2026 Joint Annual Review, held under the theme “Make the Data Count”, brings together federal and state government officials, development partners and other stakeholders to assess progress under the Nigeria Health Sector Renewal Investment Initiative.

The initiative is being implemented through the Sector-Wide Approach, which seeks to improve coordination, financing and accountability in healthcare delivery.


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ANALYSIS: COP31 puts climate finance, fossil fuel transition, energy ambitions to test

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Nearly 11 years after the adoption of the Paris Agreement, world leaders are preparing for another round of climate negotiations amid growing concerns that global commitments are not translating into action quickly enough to address the climate crisis.

The 31st Conference of the Parties (COP31) to the United Nations Framework Convention on Climate Change (UNFCCC), scheduled for 9 to 20 November in Antalya, Türkiye, will bring together governments, climate scientists, development institutions, businesses and civil society organisations to negotiate the next steps in the global response to climate change.

The summit comes at a critical time, as countries face increasing pressure to reduce greenhouse gas emissions, accelerate investment in clean energy and protect communities already experiencing the effects of rising temperatures.

Yet some of the most difficult questions in international climate negotiations remain unresolved.

Who should pay for climate action? How quickly should countries move away from fossil fuels? And how can developing economies pursue economic growth while reducing emissions and protecting vulnerable populations?

These questions are particularly important for Nigeria and other African countries, where the consequences of climate change are becoming increasingly visible through flooding, drought, extreme heat and pressure on agricultural production.

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Beyond the environmental consequences, the negotiations have implications for electricity access, public health, food security, employment and the ability of developing countries to attract investment in cleaner technologies.

COP31 is not expected to produce a single agreement comparable to the Paris Agreement. Instead, much of the work will centre on implementing existing commitments, resolving disagreements carried over from previous conferences and establishing clearer pathways for financing climate action.

The central test will be whether countries can move beyond repeated declarations and agree on practical measures that deliver measurable results.

An unusual leadership arrangement

One distinctive feature of COP31 is the arrangement between Türkiye and Australia, which will share responsibilities for organising and leading the conference.

Türkiye will host the summit, with its Minister of Environment, Urbanisation and Climate Change, Murat Kurum, serving as COP president. Australia’s Minister for Climate Change and Energy, Chris Bowen, will serve as president of negotiations.

The arrangement followed a compromise after both countries pursued competing bids to host the conference.

Under the agreement, Türkiye will oversee the presidency and action agenda, while Australia will lead the formal negotiations.

The partnership is significant because the two countries approach climate policy from different economic positions.

Türkiye is an emerging economy seeking to expand industrial development and energy security, while Australia is a developed economy with substantial fossil fuel production and exports.

Their leadership will therefore be tested by the same disagreements that have complicated previous climate summits, particularly those concerning fossil fuels, climate finance and the responsibilities of developed and developing countries.

The Turkish presidency has placed implementation, electrification, green industrial development and resilient infrastructure among its priorities.

One of its flagship initiatives is the 35-by-35 Global Electrification Pledge, which seeks to increase electricity’s share of global final energy consumption to 35 per cent by 2035, from just over 20 per cent.

The initiative is intended to encourage greater use of electricity in transport, buildings and industry, supported by cleaner power generation, modern electricity grids and energy storage.

However, the pledge forms part of the presidency’s voluntary action agenda rather than a binding agreement negotiated by all countries.

This distinction matters because announcements made by summit organisers do not automatically become obligations under the UN climate process.

The World Leaders Climate Action Summit, scheduled for 11 and 12 November, will provide an early indication of the political support available for these priorities.

The finance question remains unresolved

Climate finance is likely to be among the most contentious issues in Antalya.

Developing countries have long argued that they cannot be expected to reduce emissions and adapt to climate impacts without substantial financial support from wealthier nations, which bear greater historical responsibility for greenhouse gas emissions. This principle is reflected in Article 9 of the Paris Agreement, which requires developed countries to provide financial resources to support developing countries’ mitigation and adaptation efforts.

At COP29 in Baku, Azerbaijan, in 2024, countries agreed that developed nations should take the lead in mobilising at least $300 billion annually in climate finance for developing countries by 2035. The agreement also called for efforts to scale up finance from all public and private sources to at least $1.3 trillion annually by the same year.

The two figures are not interchangeable. The $300 billion target is the new collective finance goal led by developed countries, while the wider $1.3 trillion ambition is expected to draw on a broader range of sources, including private investment.

For developing countries, the concern is whether the money will be available on affordable terms and reach the communities and sectors most exposed to climate risks.

A major disagreement concerns the responsibility of developed countries to provide financial resources under the Paris Agreement.

Developing countries want discussions to address these obligations, particularly the provision of public finance. Some wealthier countries favour a broader approach that includes improving access to finance and expanding the range of contributors.

For Nigeria, the funding needs are substantial.

The country requires investment in renewable energy, electricity infrastructure, climate-resilient agriculture, flood management and early-warning systems. Many of these interventions will depend on concessional finance and public investment, rather than private capital alone.

The question at COP31 will be whether countries can make progress on the scale, quality and accessibility of climate finance, rather than simply restating funding ambitions.

Fossil fuels and the just transition

The future of fossil fuels will also remain a difficult issue.

At COP28 in Dubai in 2023, countries agreed for the first time in a final climate decision to transition away from fossil fuels in energy systems in a just, orderly and equitable manner. The agreement also called for tripling global renewable energy capacity and doubling the rate of energy-efficiency improvements by 2030.

The decision marked a significant shift in climate negotiations. However, countries have continued to disagree over how to implement it, and the commitment has yet to translate into an agreed global roadmap for moving away from coal, oil and gas.

At COP30 in Belém, Brazil, in 2025, countries failed to secure a formal roadmap for the transition away from fossil fuels. The omission exposed the continuing divide between nations seeking faster action and those whose economies depend heavily on fossil fuel production.

The issue is particularly sensitive for Nigeria, where oil and gas remain important sources of government revenue and foreign exchange. At the same time, millions of people lack reliable electricity, while gas flaring, pollution and energy poverty continue to affect communities.

A transition that ignores these realities risks deepening existing inequalities. But maintaining dependence on fossil fuels without a credible plan for cleaner energy also exposes the country to economic and environmental risks as the global energy system changes.

This is where the just transition mechanism agreed at COP30 becomes important. Countries are expected to discuss its structure and implementation at COP31.

The mechanism is intended to strengthen international cooperation, technical assistance and capacity-building to help countries and workers navigate the shift to lower-carbon economies.

For Nigeria, a meaningful just transition must go beyond replacing one energy source with another. It should address the affordability and reliability of electricity, the future of workers in fossil fuel-dependent industries, the development of local clean-energy businesses and the needs of communities affected by environmental degradation.

Adaptation cannot wait

While emissions reduction receives considerable attention at climate summits, adaptation is equally urgent for countries already experiencing the effects of climate change.

Flooding, prolonged dry spells and rising temperatures are affecting livelihoods and infrastructure across Africa. In Nigeria, recurring floods have displaced communities, damaged homes and farms, disrupted transport and increased pressure on public services.

The effects extend beyond physical damage.

Extreme heat can affect workers’ productivity and health, while disruptions to agricultural production can worsen food insecurity. Poorer households often have fewer resources to recover from these shocks.

At COP30, countries agreed on 59 indicators to help measure progress towards the Global Goal on Adaptation. The indicators are intended to assess how countries are strengthening resilience in areas such as water, food systems, health and infrastructure.

However, agreeing on indicators does not automatically provide the resources needed to implement adaptation plans. Developing countries continue to demand more predictable funding, particularly for projects that may not attract private investment.

COP30 also called for efforts to at least triple adaptation finance by 2035. Questions remain over how the commitment will be measured and delivered.

Nigeria’s climate ambitions

Nigeria will arrive in Antalya with an updated climate commitment that sets out a more specific emissions-reduction pathway.

Under its third Nationally Determined Contribution (NDC 3.0), submitted in 2025, Nigeria targets an absolute emissions reduction of 168.2 million tonnes of carbon dioxide equivalent by 2030 and 184.9 million tonnes by 2035, using 2018 as its base year. These targets represent reductions of about 29 and 32 per cent, respectively, against the country’s 2018 net emissions. Nigeria also maintains its ambition to achieve net-zero emissions by 2060.

The plan includes commitments for the energy, industrial, agriculture, land-use and waste sectors. For the oil and gas industry, it targets zero routine gas flaring by 2030, alongside reductions in fugitive emissions from leaks and venting.

But the challenge is turning these commitments into functioning projects and measurable results.

Achieving these targets will require sustained investment in renewable energy, stronger electricity infrastructure, effective regulation and better coordination among government agencies and private investors.

This is particularly relevant to COP31’s proposed 35-by-35 electrification target.

A narrowing window for climate action

COP31 also comes as the international community prepares for the second Global Stocktake under the Paris Agreement, the process through which countries assess collective progress towards the treaty’s goals.

The first stocktake, concluded in 2023, found that global efforts were insufficient to keep the world on track to limit warming to 1.5 degrees Celsius above pre-industrial levels. Its outcome called for faster action on renewable energy, energy efficiency, deforestation and the transition away from fossil fuels.

The latest United Nations Environment Programme Emissions Gap Report reinforces the urgency. It warns that global temperatures are expected to exceed the 1.5-degree threshold, even as it argues that the scale and duration of that overshoot can still be limited through faster emissions cuts.

The report estimates that current national climate pledges, if fully implemented, would reduce emissions by only 11 to 15 per cent by 2035 compared with 2025 levels. A pathway designed to return global temperatures to 1.5 degrees by the end of the century would require emissions to fall by 45 per cent by 2035.

The United States’ absence from the official government delegation will also be notable.

The country formally withdrew from the Paris Agreement in January 2026, presenting another challenge to international cooperation at a time when stronger action from major emitters is needed.

Ultimately, the significance of COP31 will not be measured by the number of speeches, announcements or pledges made in Antalya. It will depend on whether countries can resolve outstanding disagreements, strengthen support for vulnerable nations and establish practical pathways for delivering commitments already on the table.

For Nigeria, the summit should be more than an opportunity to restate its climate ambitions. It is a chance to push for accessible finance, strengthen the case for investment in clean energy and ensure that the transition supports jobs, electricity access and livelihoods.

This report is published as part of the COP31 Reporting Fellowship of the Centre for Journalism Innovation and Development


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