The E.U. has prohibited some pigments, deeming them potentially hazardous to humans. Artists and manufacturers around the world are struggling to find replacements.

The vaccines seem safe for children and are likely to protect against severe illness. But data on efficacy are thin, and most children have already been infected.

The cancer eventually will become the third most common type among women, experts say. The mortality rate is highest among Black Americans.

On Saturday, the scientists are expected to recommend the Moderna and Pfizer-BioNTech vaccines for young children. Doses could be available next week.

This year’s outbreak of the H5N1 virus has resulted in the deaths of nearly 400,000 wild birds worldwide. Scientists are studying the pathways of contagion among species.

Some scientists believe that a clearer picture of Covid vaccine efficacy could have emerged sooner if investigators had tracked certain immune cells, not just antibodies.

The drug, crenezumab, failed to prevent early symptoms or slow cognitive decline, the latest setback in the long quest to find effective therapies for the disease.

Dr. Hans Kluge, the organization’s director for Europe, said that the longer the virus circulated, the wider its reach would be.

The editor of a new book of essays shares how Black men can attend to their mental health while growing their families.

Severe storms flooded parts of the facility in Sturgis, Mich., which went offline in February over contamination concerns, exacerbating a nationwide formula shortage.

By fishing shards of bacterial DNA from the teeth of bodies in a cemetery, researchers found the starting point for the plague that devastated Eurasia, they say.

States have already ordered millions of doses; if the agency authorizes them in the coming days, babies, toddlers and preschoolers could start receiving shots next week.

Be aware but don’t panic, say health officials and advocates as cases of the disease tick upward in New York and around the country.

Times readers with babies, toddlers or preschoolers who are unvaccinated against the coronavirus wrote in about worries and strains, loneliness and lost time.

A new survey of the nation’s abortion providers found increases in every region of the country from 2017 to 2020.

Women can no longer get a legal abortion in two states.

More teenagers than ever are seeking transitions, but the medical community that treats them is deeply divided about why — and what to do to help them.

Sierra Leone is one of a few countries in sub-Saharan Africa that have not banned cutting. Now, young women are defying mothers and grandmothers by refusing to undergo the procedure.

The patient had the full suite of symptoms — and a jaw that somehow moved out of alignment. That was the clue something was wrong.

A new study finds that the feline reaction to catnip and silver vine helps to stave off mosquitoes and other bloodsucking insects.

Researchers are drilling down into the ways life on a hotter planet will tax our bodies, and looking for protections that, unlike air-conditioning, don’t make the problem worse.

One company, Floreo, is hoping their tools will lead the way, despite some criticisms from autism self-advocates.

The F.D.A. is also reviewing the treatment, Albrioza, but the agency’s scientists have raised questions about its effectiveness.

The demise of Roe v. Wade would make the need for effective birth control more urgent than ever. Yet many American women still have a hard time obtaining it.

The drug, made by Eli Lilly, is already used for rheumatoid arthritis, and could be followed by two more drugs from other companies.

Patients whose brain injury coincidentally relieved their nicotine cravings may help unravel the neural underpinnings of addiction, a new study suggests.

A new clinical trial is the largest to date testing the antiparasitic drug on people with Covid.

Outside experts will make their recommendations this week on how the agency should rule on applications from Pfizer and Moderna to vaccinate the nation’s youngest children.

Some reinfection questions, answered.

New estimates based on C.D.C. health surveys point to a stark generational shift in the growth of the transgender population of the United States.

People are far more likely to give the virus to cats than cats are to pass it to humans, experts stress.

The virus “is not known to linger in the air,” agency officials said. But the research is far from definitive.

The tests screen for cancers that often go undetected, but they are expensive and some experts worry they could lead to unnecessary treatments without saving patients’ lives.

“The lack of political cooperation from China continues to stifle any meaningful progress,” one expert said.

Most of the state abortion prohibitions that would go into effect if Roe v. Wade is overturned do not contain carve-outs that were once widely supported by abortion opponents.

The spread of the subvariants adds more uncertainty to the trajectory of the pandemic in the United States.

Dr. Kevin M. Cahill performed abusive and unnecessary examinations, a former patient claims in a lawsuit, and pursued her romantically for years. His lawyer says the exams were appropriate.

The study was small, and experts say it needs to be replicated. But for 18 people with colorectal cancer, the outcome led to “happy tears.”

Research shows that debt has risen among older people, and those who owe are more likely to have multiple diagnosed illnesses.

American teenagers are reporting severe levels of anxiety and depression. But when Connecticut moved to expand mental health services in schools, it ran into fierce opposition in one town.

As the number of cases outside Africa approaches 800, governments are scrambling for a limited pool of vaccines and treatments with unclear effectiveness.

3DBio Therapeutics, a biotech company in Queens, said it had for the first time used 3-D printing to make a body part with a patient’s own cells.

Another patient who had the same treatment did not survive. But the demonstration of the technique could help with other cancers.

A 4-year-old in Ohio is one of hundreds of children worldwide who have developed unexplained liver problems in recent months.

Last year, people 65 and older died from Covid at lower rates than in previous waves. But with Omicron and waning immunity, death rates rose again.

MDMA-assisted treatment for post-traumatic stress disorder “represents real hope for long-term healing,” health experts say.

Some people may test positive for the coronavirus for 10 days or longer, but interpreting those results remains difficult, experts said.

Many U.S. hospitals are postponing scans used to diagnose diseases after a Covid lockdown in China hobbled the main U.S. supplier of an imaging chemical.

Older people who received smallpox vaccinations may yet have some immunity, researchers say. Healthy children and adults generally do not become severely ill.

Agency inspectors found a leaking roof, standing water and cracked production equipment before a facility shutdown that led to major shortages.