Freelance health journalist for the Telegraph, Guardian, BBC, Wired, New Scientist & others. Former University of Cambridge neuroscientist and mental health researcher. Contact: dcwriter89@gmail.com
The risks of vaping and how to quit
With vape shops popping up on high streets in even the most rural communities, an entire generation is steadily becoming hooked on e-cigarettes, with recent data from Cancer Research UK (CRUK) highlighting a worrying trend.
Vapes or e-cigarettes were originally devised as a safer alternative for chronic smokers, helping them to transition away from more harmful, conventional cigarettes. But it’s becoming apparent that their proliferation is also actively drawing in non-smokers, who are becomi...
The six least survivable cancers – and how to protect yourself against them
For the more than 90,000 people in the UK who are newly diagnosed with cancer of the lung, liver, brain, oesophagus, pancreas or stomach every year, the prognosis is uniquely grim.
According to data released by the Less Survivable Cancers Taskforce, more than half of these patients will die within just 12 months. For these diseases, progress has largely stood still, even though for cancer as a whole, survival rates continue to improve dramatically. When all cancers are considered, the one-yea...
Is a brain-stimulation headset the answer to depression?
The makers of a device that delivers small electrical impulses to the brain are hailing the technology as a groundbreaking mental health treatment, but others are sceptical
“Flow helps the vast majority of people to improve their depression,” reads the latest marketing email from Flow Neuroscience, a Swedish-based company that has been making headlines over the past year with what it describes as an “innovative brain-stimulation treatment” that patients can use in their own homes.
Flow’s user...
Human Metapneumovirus Is Finally Being Taken Seriously
As head of one of the world’s only dedicated research labs focused on human metapneumovirus, John Williams used to spend most of his time attempting to convince skeptical doctors the virus was real. So when the recent outbreak in northern China was met with widespread alarm, Williams allowed himself a wry smile. The forgotten burden of public health was finally being taken seriously.
Human metapneumovirus, or hMPV, was first identified 24 years ago by a ...
This drug is the 'breakthrough of the year' — and it could mean the end of the HIV epidemic
It's a question that dates back to the start of the epidemic in the 1980s. With 1.3 million new infections a year, the epidemic continues … and the world is not on track to meet the ambitious U.N. goal of ending HIV/AIDS by 2030.
But 2024 has fueled increasing optimism among leading infectious disease experts after the results of two groundbreaking clinical trial results for a drug called lenacapavir showed it to be capable of virtually...
I tested my belly fat – the results were horrifying
In a basement office in central London, I am poring over a scan showing an alarmingly high amount of visceral fat in my body; layers of fat cells deep within the body, especially around my stomach and vital abdominal organs.
Why is it so alarming? Because the wider dangers of this have been brought to light recently by a new study from researchers at Washington University School of Medicine in St Louis. It showed that having more visceral fat in your 40s and 50s places you at greater risk of ...
Why do kids with cancer in the Global South have such low survival rates?
Every year, an estimated 400,000 children worldwide develop a form of cancer.
Five-year survival rates in high-income nations are typically over 80%, with an expected cure rate of near 100% for some cancers like retinoblastoma — a malignant eye tumor that strikes about 8,000 children annually.
The picture in low- and middle-income countries is far bleaker. The average five-year survival rate for children in these countries ...
The scientists giving Ozempic to pensioners to stave off dementia
Prevention has long been regarded as the best strategy for tackling Alzheimer’s disease – a degenerative condition which leads to the progressive loss of brain cells, affecting memory and other cognitive functions. But until relatively recently, researchers have been at a loss for potential ways of halting it in its tracks.
Now, however, doctors are turning to a drug more commonly associated with weight loss to tackle loss of anot...
Long Fatigue: The exhaustion that lingers after an infection
Before Long Covid there was post-viral fatigue – a mysterious set of illnesses caused by other infections. Now scientists are starting to unravel their secrets.
Since an acute infection with Covid-19 in the summer of 2023, Rachael Edwards has been battling a fatigue so crippling that it has left her bedridden for weeks at a time. A previously healthy 31-year-old marketing manager living in Amsterdam, she describes feeling like she is "weighted down by an anchor".
"Long Covid fatigue differs f...
Revealed: ex-director for tobacco giant advising UK government on cancer risks
Questions raised about potential for undue influence after appointment of Ruth Dempsey, formerly of Philip Morris
A former director at the tobacco giant Philip Morris International (PMI) was handed a role on an influential expert committee advising the UK government on cancer risks, the Observer can reveal.
Ruth Dempsey, the ex-director of scientific and regulatory affairs, spent 28 years at PMI before being appointed to the UK Committee on Carcinogenicity of Chemicals in Food, Consumer Produ...
Cholera, Zika and West Nile: The deadly diseases that sweep in after hurricanes
Disease-causing microorganisms churn in the floodwaters after a hurricane and grow in people's homes long after the first danger has passed. But knowing when to seek medical attention can help limit the spread of disease after a storm.
Over the last seven years, Naresh Kumar and colleagues at the University of Miami have been steadily collecting data on hurricanes, from Maria in 2017 to Irma, Ian, Michael, Dorian and now the recent Hurricanes Helene and Milton, deadly storms which have all in...
The smartwatches that can predict Parkinson’s disease
Smartwatches gather vast amounts of data about our physiology. Now their technology is being harnessed like never before.
As the chief anaesthesiologist at CHUV University Hospital, Patrick Schoettker is all too aware of the complications which can follow a lengthy operation under general anaesthetic.
Rapid blood loss from the surgical site can send the patient into shock, triggering sudden and dangerous dips in blood flow through the body. But patients can also develop severe lung problems a...
Why thousands of dementia sufferers are being denied the new miracle drug
In late 2022, the results of a groundbreaking stage three trial for a ‘miracle’ new Alzheimer’s drug lecanemab were hailed as momentous. Finally, for the first time, a drug had slowed the progression of the deadly disease.
Hundreds of patients had received it over the course of many years as part of the testing process, with participants going on to speak openly about how much it had improved their lives.
Yet now, two years on, if you or a loved one discovers they have Alzheimer’s, it is high...
Pre-eclampsia: The deadly mystery scientists can't solve
The condition causes more than 70,000 maternal deaths every year – but its causes continue to elude scientists.
After a glittering track and field career which saw her rack up seven Olympic gold medals and 14 world championship golds, Allyson Felix assumed that pregnancy would be as smooth as her trademark running style.
"All my life, I've taken care of my body, my body has been my tool, and it has never really failed me," says Felix. "I've trained and I've put demands on my body, and it's ...
'These are people in the prime of life': The worrying puzzle behind the rise in early-onset cancer
There are rising cases of breast, colorectal and other cancers in people in their 20s, 30s and 40s. What is going on?
Over the past 10 years, rates of colorectal cancer among 25 to 49 year olds have increased in 24 different countries, including the UK, US, France, Australia, Canada, Norway and Argentina.
The investigation's early findings, presented by an international team at the Union for International Cancer Control (UICC) congress in Geneva in September 2024, were eye-catching as they ar...