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Public Health

Should you take vitamin D? Here’s the science

Some people take too much, and too many get too little. Experts explain who needs D supplements, and why.

What’s next in the Ozempic era?

Diabetes, weight loss and now heart health: A new family of drugs is changing the way scientists are thinking about obesity — and more uses are on the horizon

Inching toward a global treaty on plastic pollution

Delegates from 175 nations are working on an international agreement that would tackle the vast amounts of plastic waste in the environment. A marine scientist specializing in plastic pollution discusses the problem and her hopes for the proceedings.

Why isn’t dental health considered primary medical care?

Ailments of the mouth can put the body at risk for a slew of other ills. Some practitioners think dentistry should no longer be siloed.

All about cholesterol

The latest science on how blood levels of HDL, LDL and more relate to cardiovascular health

Soda taxes can’t reverse the obesity epidemic

OPINION: They might be able to help, but only if well-designed and in combination with other policies

Getting rid of bed bugs: Trickier than ever

The blood-sucking insects now show up in two varieties and are resistant to many pesticides. New eradication strategies include fungal spores and nasty human odors.

We urgently need data for equitable personalized medicine

OPINION: A massive bias in medical studies toward men of European origin means that genetic variants in understudied populations don’t get the focus they deserve

Genes and heart disease: Finally making the link

Polygenic risk scores — a patient’s chance, based on tiny DNA variants, of developing cardiovascular disease, breast cancer and more — are coming to clinics. But there are kinks to iron out and accuracy remains an issue.

The remaining frontiers in fighting hepatitis C

A scientist whose work was key to identifying, studying and finding treatments for this life-threatening virus discusses the scientific journey and challenges that persist

How optimizing indoor humidity can help stop the spread of Covid and flu

OPINION: Recent CDC guidelines for indoor air quality disregard the benefits of humidity. But research shows it can kill viruses and help thwart infections.

Rapid experiments to improve health-care delivery

Public health experts are borrowing a technique from the tech world to make messaging more effective — so that patients are more likely to get preventive care

Medications for opioid use disorder — MOUD — and adolescents

Treatment with drugs such as buprenorphine, methadone and naltrexone is deemed the gold standard for youth with opioid addictions. Why isn’t it used more often?

New views of a cough: From TB and chronic cough to hope for Parkinson’s

Scientists are revealing new secrets of the reflex that protects our lungs, spreads disease and irritates us all

Dealing with rats, and their health, in America’s ‘rattiest’ city

OPINION: A study in Chicago found that rodents surviving poisoning are more likely to carry disease. Good pest control needs to take such things into account.

Zooming in on the brains of babies

New tools are helping neuroscientists investigate why early life is such a crucial time for neural development

The baby brain: Learning in leaps and bounds

VIDEO: Learn how the baby brain changes from gestation to toddlerhood, and what parents, teachers and policymakers can do to ensure kids are set up for success

What is the protein of the future?

OPINION: It’s sustainable, nutritious and delicious. Scientists need to ramp up efforts to meet this urgent need.

Covid, RSV and the flu: A case of viral interference?

The ‘tripledemic’ unfolding this winter is one of several odd trends among respiratory virus infections these last years. Viruses, it turns out, can block one another and take turns to dominate.

America is failing women’s health

OPINION: Systemic inequity means women in the US die younger and suffer more than they should. It’s time for health for all.

What next-gen Covid-19 vaccines might look like

From building up defenses in the nose to slowing down a virus’s ability to make copies of itself, scientists are rolling out a raft of creative approaches to fighting infection

What can cities do to survive extreme heat?

Urban heat waves are getting worse, but better data and timely government action could make them less deadly

She saw the obesity epidemic coming. Then an unexpected finding mired her in controversy.

Katherine Flegal was a scientist who found herself crunching numbers for the government, until one day her analyses set off a firestorm. What does she make of her decades as a woman in public health research?

The US abortion decision is already having global impacts

OPINION: The reversal of Roe v. Wade is a tragedy not just for the United States, but for women everywhere

This myth about guns is killing us

OPINION: The idea that gun violence prevention research is at odds with gun rights is just not true

Sex, immunity and the brain

Differences between the immune systems of males and females — in particular, ones involving cells called microglia — might help explain why the risk for conditions such as autism and Alzheimer’s varies between the sexes

Covid and the brain: A neurological health crisis

VIDEO: Even a mild SARS-CoV-2 infection can cause inflammation that disrupts neural communication, says Stanford neurologist Michelle Monje. Her concern is that Covid-19 may leave millions dealing with cognitive problems, from a loss of mental sharpness to lapses in memory, that prevent them from returning to their previous level of function.

The race against radon

Scientists are working to map out the risks of the permafrost thaw, which could expose millions of people to the invisible cancer-causing gas

Does online opioid treatment work?

The Covid-19 pandemic brought a sudden shift to virtual health care. That has increased access — and possibly outcomes, too — for patients with opioid use disorder.

How antidepressants changed ideas about depression

PODCAST: Serendipitous discoveries led to drugs like Prozac and to new insights into the physical basis of this debilitating disorder. But scientists continue to search for deeper understandings and therapies that will bring relief to those who still struggle. (Season 2, Episode 6)

Vaccinating the world against Covid-19

Lower-income countries haven’t gotten an equal share of lifesaving coronavirus vaccines. Older, more familiar vaccine technologies may hold the key to more equitable use, says Maria Elena Bottazzi.

A path to Covid-19 vaccine equity

VIDEO: When can the people who still need a Covid-19 vaccine expect to get one? Delve into the supply, distribution and political issues delaying global access to a lifesaving, economy-rescuing marvel.

The invention of incarceration

Prisons have been controversial since their beginnings in the late 1700s — why do they keep failing to live up to expectations?

Pandemic psychology: Nothing new under the Sun

OPINION: Our behavior during Covid-19 echoes that of individuals, societies and governments during past plagues. We can and should do better.

The science of placebos is fueling quackery

OPINION: The placebo effect is real. So are the ethical conundrums posed by those who would exploit the latest research advances for profit.

Behind bars: The invention of mass incarceration

VIDEO: In the US today, prisons are an entrenched part of the criminal justice system, yet they are a relatively modern way of dealing with crime. How have society’s attitudes toward punishment shifted over time and why does it matter? Join us for a free online event on Wednesday, March 23.

How to short-circuit short-term thinking

OPINION: Human behavior is fueling major social dilemmas — from climate change to the Covid pandemic to the spread of misinformation. But that means it’s also the solution, if only we can harness psychology for the common good.

Exercise boosts the brain — and mental health

Working out buffs up the body — and perhaps the mind, too. New research is revealing how physical activity can reduce and even ward off depression, anxiety and other psychological ailments.

New antifungal medications are sorely needed

Better treatment for Candida auris, Aspergillus and other dangerous fungal pathogens is slow to come, even as rates of drug resistance rise. New therapies are in the pipeline, and hospital practices can help.

How zinc helps you fight off infections

Our bodies require the vital mineral for the healthy functioning of the immune system 

Searching for a better treatment for eating disorders

Cognitive behavioral therapy is proving to work well, but only for some patients. Scientists are seeking new innovations to help people grappling with the pervasive and often-hidden problems of anorexia, bulimia and binge eating.

How racism in early life can affect long-term health

OPINION: Excessive adversity activates biological reactions that can lead to lifelong problems in physical and mental wellbeing

What does it mean to have prediabetes?

It’s complicated: Prediabetes has multiple definitions and there may be different subtypes. But for many people who develop it, changes in lifestyle drastically lower the risk of progressing to diabetes.

Let’s change how we pay for hospitals

OPINION: Many health facilities were already in fiscal straits before Covid-19 — except in Maryland. The state’s innovative and sound approach could be the answer to rescuing systems nationwide.

Viral variants: From Covid to the flu

VIDEO: Some variants of SARS-CoV-2, such as Delta, will drive new waves of COVID-19 infections. What can previous studies of the flu, HIV and SARS tell us about the course that this pandemic may take?

Why Covid-19 testing went so wrong in the US, and what to do now

VIDEO: Delays, errors and a fragmented response initially kept public health officials in the dark about the spread of SARS-CoV-2. More tests and easy access could still play a critical role in slowing the virus.

Covid’s main lesson? For this journalist, it’s unpredictability

VIDEO: New York Times science reporter Apoorva Mandavilli chronicles the rise of the delta variant, the latest of many twists in the pandemic that she’s covered since it began. Delta has left parents in an especially tough spot, with schools opening but young children still vulnerable.

Salmonella: Why it’s a chicken and egg thing

Eliminating this food-poisoning bacterium from poultry is tricky — not least because rapid, precise tests are still unavailable. Researchers are looking at vaccines, probiotics, prebiotics and even essential oils as ways to reduce contamination on the farm.

Why don’t kids tend to get as sick from Covid-19?

Some children have been hospitalized and some have died, but at a tiny fraction of the adult rate. As children head back to school, scientists are hoping that research will provide answers.

Tackling the growing problem of overmedication

Polypharmacy — taking five or more meds at a time — leads to side effects, unnecessary hospitalizations and premature deaths. Researchers and pharmacists are seeking solutions to this serious public health problem that disproportionately affects older adults.

Studying poverty through a child’s eyes

Research on early-life adversity should pay more attention to the perspective of children themselves

Building an immune system for the planet could prevent the next pandemic

OPINION: We need a global information network that spans borders so we can spot — and stop — new pathogens before they threaten world health

Foods of abuse? Nutritionists consider food addiction

Cookies, chips, hot dogs and other ultraprocessed fare raise risk of runaway eating

The great sleep divide

Sleep deficits are robbing poor people and racial minorities of health and earning power. What can be done?

Monitoring our health with smartwatches

VIDEO: Wearable devices are increasingly used for tracking health data and identifying problems. Learn from health researchers about exploring the promise and pitfalls of personal tech.

SARS-CoV-2: Evolution of a virus

VIDEO: Scientists expected the novel coronavirus would mutate and change. But its runaway spread means new, more dangerous variants are more likely to emerge. Harvard computational geneticist Pardis Sabeti explains.

Ah, wilderness! Is nature the tonic we’ve needed for pandemic malaise?

As Covid-19 descended across the world, people sought refuge in gardens, parks and the woods. But it’s hard to measure how being in nature affects our well-being — and how we can best reap its rewards.

Yes, all this screen time is hurting your eyes

OPINION: A neuroscientist says that he’s particularly worried about kids, who may have spent much of last year learning online. Some easy hacks can help.

Know thine enemy: Why genetic sequencing is key to tracking Covid-19

The US effort to analyze viral genomes, slow to start, is now picking up speed

How to convince people to accept a Covid-19 vaccine

Hesitancy rates are falling but they’re still sizable, especially among certain groups. Easy access and trusted community messengers are keys to moving the needle.

Growing a more resilient global food system

Covid-19 has been a stress test for the world’s food supply chains — and a preview of looming threats. That’s making efforts to improve the journey from farm to fork more urgent than ever.  

Solving the pandemic’s drinking problem

The Covid-19 lockdown has changed alcohol habits, but public health researchers face a blurred and incoherent picture of who’s been drinking, and how much

Another way that Covid can kill: Car crashes

OPINION: Traffic is down, but deaths are up. Here’s how to stay safe on the road.

The varied landscape of universal health care

There’s more than one way for a nation to achieve universal coverage for its residents. Here are the systems of six different countries.

How health insurance is faring under Covid

Millions of Americans lost employer-sponsored coverage when Covid-19 disrupted their jobs. Can America come up with a better system?

Battling arsenic pollution

Arsenic-poisoned water remains a threat to public health the world over. Scientists hope to change that.

Coronavirus transmission: SARS-CoV-2 in the air

VIDEO: One year into the pandemic, a clearer understanding of how Covid-19 infections spread suggest people need to shift efforts away from cleaning surfaces and toward better ventilation and filtration

How the pandemic could change architecture

COMIC: Covid-19 has inspired a rethink of how we design and use our built environments

Coronavirus evolving: How mutations arise and new variants emerge

COMIC: As it spreads throughout the world, the virus that causes Covid-19 has been changing. Scientists are tracking those changes, hoping to stay one step ahead of worrisome strains.

Don’t let Covid boost another killer

OPINION: The pandemic may be interfering with our fight against drug-resistant bacteria. Luckily, the same tactics can beat back both scourges.

Sounding the alarm: How noise hurts the heart

Loud road and air traffic has been linked to a greater risk of high blood pressure, heart attacks and strokes. Scientists are uncovering new details about how what you hear stresses the cardiovascular system.

How has the pandemic influenced public attitudes toward science?

VIDEO: Watch our conversation about how understanding and trust in science have changed in the past year, science’s evolving role in society and how group identities shape people’s views.

The challenges of antiviral treatments

Antibiotics abound, but virus-fighting drugs are harder to come by, and Covid-19 amply shows how much we need them. Fortunately, scientists are getting better at making and finding them.

How enlisting dentists can speed up Covid-19 vaccinations

OPINION: Dental care providers have the skills, the facilities and the trust of patients who might otherwise miss out 

Are too many scientists studying Covid?

The pandemic prompted many scientists to pivot their research to the coronavirus. That’s not an entirely good thing.

How to help Covid-19 long-haulers

OPINION: Patients with lingering symptoms need access to specialized clinics — and so much more

Don’t abandon paid sick leave. It’s a cost-effective tool against Covid-19.

OPINION: Requiring companies to give unwell workers compensated time off isn’t a burden. It’s smart public health policy that reduces the spread of disease.

How to change behavior during a pandemic: From personal habits to public health

VIDEO: Watch our conversation about the science of behavior change — from public health tools to slow the pandemic to keeping New Year’s resolutions <em xmlns="http://pub2web.metastore.ingenta.com/ns/"/><em/>

Virtual agents of change: How computers are mapping Covid-19’s future

Traffic planners, securities traders and military strategists all use it. Simulating the behavior of millions of idiosyncratic individuals also may be the best way to understand complex phenomena like pandemics.

How researchers are making do in the time of Covid

The coronavirus pandemic has shuttered labs and sidelined scientists all over the world. Here’s a look at how some of them have coped.

Preventing the next pandemic: Exploring the origins and spread of animal viruses

VIDEO: Watch our conversation about how infectious agents are transmitted from one species to another, and what can be done to prevent future pandemics

Evolution of the US public health system

TIMELINE: From colonial efforts to control smallpox outbreaks to antimalarial campaigns targeting mosquitoes, the American effort grew for centuries. But cutbacks have weakened it in the past decades. 

Pandemic puts all eyes on public health

Covid-19 has exposed the weak spots of the US public health system — and that presents an opportunity, says an epidemiologist, for the nation to recognize the problems and act to fix them

I got the Pfizer Covid-19 vaccine. Or maybe not.

OPINION: Many Americans say they won’t take a vaccine. I am not one of <br xmlns="http://pub2web.metastore.ingenta.com/ns/"/>them — and I have the shots to prove it.

I tested positive for Covid-19 antibodies — what now?

As immunologists struggle to understand the immune response, psychologists want to know how infected people will think and behave after they recover

Getting a Covid-19 vaccine — quickly and safely

Researchers around the globe are working with unprecedented speed to find the vaccines we need to find our way through the pandemic. What’s the bar for safety and effectiveness?

Matching meals to metabolism

Genes, microbes and other factors govern how each person’s body processes nutrients. Understanding the connections could help optimize diets — and health.

How viruses evolve: Lessons for the pandemic

Pathogens that switch to a new host species have some adapting to do. How does that affect the course of a pandemic like Covid-19?

Speaking of pandemics: The art and science of risk communication

Public health messages should be loud and clear, so that everyone listens and stays safe. But that’s easier said than done — especially with a case as complex as Covid-19.

Data viz experts explain Covid-19 graphics | Things to Know

VIDEO: Scientists break down what some popular visualizations of the pandemic can and cannot tell us

An old problem: How immune responses weaken with age

The body’s defenses lose flexibility and diversity over time, and protective responses to vaccines weaken as well. Scientists are working on ways to boost seniors’ protections against influenza, the novel coronavirus and other pathogens.

Digital disease surveillance: Tracking a pandemic

Social media posts and online searches may offer vital clues about the spread of influenza — and now Covid-19. But they also risk errors and threaten privacy.

Living with chronic illness: Why some cope and others don’t

What helps some people diagnosed with cancer, heart disease or diabetes stay relatively happy and healthy, while others are devastated? Psychologist Vicki Helgeson explains the traits and mindsets that can make the difference.

The global soda tax experiment

An increasing number of cities and countries have begun taxing sugary beverages. But can raising the price of these drinks really make a dent in obesity, diabetes and other ailments?

The quest for better baby formula

Replicating human milk is no easy feat — nor is separating the science from the hype

The next omics? Tracking a lifetime of exposures to better understand disease

Of the millions of substances people encounter daily, health researchers have focused on only a few hundred. Those in the emerging field of exposomics want to change that.

Curious cure: Human waste

Studies point to the life-saving record of fecal transplants for patients infected with C. diff, despite a recent death. Doctors are now testing the procedure for other conditions.

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