Hälsa & medicin

A new study finds that vaccinating people who've already had COVID-19 strengthens their immune response across a broad range of B cells—the antibody-producing cells critical to fighting infection. The finding has implications for vaccine strategy and could inform how public health authorities design booster campaigns for maximum protection.EN

A new study reveals that psychological fear—not just physical injury—prevents young athletes from returning to sports after ACL reconstruction. Understanding these mental barriers could reshape rehabilitation programs and reduce long-term career losses for the athletic population.EN

Researchers identified inflammatory markers in deciduous teeth that distinguish children with autism spectrum disorder, suggesting teeth could serve as a non-invasive screening tool. The finding could enable earlier diagnosis and intervention, with implications for pediatric healthcare systems and diagnostic companies developing new ASD screening methods.EN

Babies born too early or too large face significantly elevated risks of developing atrial fibrillation—a common heart rhythm disorder—by their 40s and 50s, according to new research. The finding suggests birth complications may have lasting cardiovascular consequences, potentially shifting how clinicians monitor and counsel at-risk patients throughout adulthood.EN

Neuroscientists have mapped the brain regions that create our sense of ownership and control during movement, a finding with implications for treating neurological disorders, designing better prosthetics, and understanding conditions like phantom limb syndrome. The research could reshape how clinicians approach rehabilitation and motor recovery.EN

A new study finds that mothers who participate in support programs report meaningful shifts in how they manage co-parenting with partners struggling with alcohol use. The findings could inform workplace wellness initiatives and family support policies, as parental alcohol problems cost employers billions in lost productivity and healthcare spending.EN

**Miljöns roll är avgörande för psilocybins neurogena effekt** Psilocybins potential att öka synaptisk plasticitet vid affektiva störningar är känd, men nya fynd från Köpenhamn och Stockholm visar att terapeutisk miljö bestämmer både effekten och hållbarheten. I en randomiserad studie fick femton friska deltagare 0,3 mg/kg psilocybin antingen i en MRT-scanner eller en terapilik miljö. Forskarna mätte synaptisk densitet via SV2A-PET en vecka efter dotering. Medan ingen signifikant densitetsökning sågs totalt sett, visade gruppen i terapilik miljö intensivare mystiska upplevelser, långvarigare psykologiska effekter och större synaptisk tillväxt än scanner-gruppen. För kliniker och investerare innebär detta att fysisk setting måste vara en del av regulatoriska protokoll för psykedelisk assisterad terapi. Designval påverkar behandlingsresultatet — en kostnadsfaktor som måste vägas in vid implementering och investeringsbeslut.

**Högre aktivitet i första behandlingsfraktionen optimerar neuroblastomaterapi** Lutetium-177-behandling med DOTATATE visar betydligt bättre tumördoser när aktiviteten ges uppdelat i två fraktioner med högre initial dos. LuDO-N-studien behandlade 14 patienter med högriskneuroblastom enligt ett dosimetriguidat schema: första fraktionen 200 MBq/kg, andra individuellt anpassad två till tre veckor senare. Tumörerna erhöll 53 procent lägre absorberad dos per injicerad aktivitet vid andra fraktionen, medan njur- och helkroppsdoserna minskade med 24 respektive 18 procent. Tumor-till-njur-förhållandet förbättrades med 44 procent mellan fraktionerna. Ingen bestående njurtoxicitet observerades; fyra patienter genomgick stamcellsåterinfusion. Resultaten stödjer en frontlastningsstrategi där högre initialdos maximerar tumörbestrålning. Karolinska Institutet och Princess Máxima Center anpassade därför protokollet till 400 MBq/kg första fraktionen för kommande patienter. Fynd direkt påverkar inköpsbeslut och behandlingsprotokoll inom molekylär radioonkologi.

**Megaproteser överträffar biologiska rekonstruktioner vid bäckenresektioner för cancertumörer** Kirurgisk behandling av mellanliggande och elakartade bäckentumörer medför höga komplikationsrisker. En systematisk litteraturöversikt av 90 studier med 2 199 patienter visar att infektioner förekommer i 15 procent av fallen, sårsäringsproblem i 13 procent och trombos i 4 procent. Implantatet behövde bytas eller avlägsnas hos 14 procent. Återanvändning av benvariga material (biologiska rekonstruktioner) gav sämre resultat än skräddarsydda metallproteser: högre frekvens av nervskador, implantatfel och behov av omoperationer. Biologiska rekonstruktioner ledde också oftare till sekundär hemipelvektomi jämfört med metallproteser eller ingen rekonstruktion. Fynden kommer från Karolinska Institutet tillsammans med europeiska och brittiska centrum. För regionvården innebär detta att protetisk rekonstruktion bör prioriteras vid urval av operationsmetod för att minska omoperationsfrekvensen och långtidsmorbiditeten.

Researchers have developed a tool to assess the right balance of human authority versus AI autonomy in aircraft systems. The framework could help airlines and regulators determine when AI assistants should decide independently versus when pilots must retain control—a critical question as automation in cockpits expands.EN

Scientists found that giving young chickens more playtime physically enlarges their brains and makes them more exploratory and social later in life. The discovery has implications for animal welfare standards in farming and suggests play may be crucial for cognitive development across species—including potentially humans.EN

Twenty years after same-sex couples gained family recognition in Sweden, new research reveals persistent obstacles in pregnancy and birth services for LGBTQ+ parents. The findings highlight gaps in healthcare equity that could inform policy reforms and clinical training across Scandinavian health systems.EN

Swedish researchers found that physicians in surgical specialties report drug side effects at one-quarter the rate of their medical counterparts, raising questions about how much patient harm goes undetected. The finding also reveals an unexpected bias: doctors report adverse reactions more often when treating patients of their own gender, suggesting systematic blind spots in pharmacovigilance.EN

A new survey of over 1,000 Swedish adults reveals a striking gap between hope and fear: 83% believe AI will deliver medical breakthroughs within a decade, yet only 41% expect mass unemployment. The finding matters because it shows the public may underestimate AI's economic disruption—a crucial blind spot for workforce planners and policymakers designing retraining programs.EN

A major Canadian trial found that blocking the middle meningeal artery during treatment of chronic subdural hematoma—a common bleeding condition in elderly patients—significantly reduces the risk of symptom recurrence. The finding could reshape treatment protocols and reduce hospital readmissions for this frequent neurological complication.EN

An international panel of experts has agreed on standard criteria for evaluating whether thermal ablation—a minimally invasive cancer treatment—has successfully destroyed liver tumors. The consensus, published in The Lancet Oncology, aims to improve treatment consistency across hospitals and help clinicians make faster, more confident decisions about patient outcomes.EN

Researchers are testing whether doctors can reliably predict neurological outcomes within 24 hours of cardiac arrest using CT scans, EEG, and blood markers—potentially shifting treatment decisions and resource allocation earlier in patient care. If validated, the finding could reshape post-arrest protocols across intensive care units worldwide.EN

Two AI systems outperformed radiologists at measuring prostate volume on MRI scans, with implications for how clinicians decide who needs biopsy. The finding, from 303 Swedish screening exams, suggests automated tools could standardize a key decision point in prostate cancer detection—potentially reducing unnecessary procedures and improving screening efficiency.EN

Use of a promising heart failure medication nearly doubled in two years, even among patients with preserved heart function—a group with few treatment options. The finding suggests doctors are rapidly adopting the drug class and signals a major shift in how heart failure is being treated globally, with significant implications for pharmaceutical companies and healthcare systems.EN

Swedish researchers documented a sharp rise in diagnosed cases of primary hyperparathyroidism between 2006 and 2020, suggesting the condition is far more common than previously recognized. The findings have implications for screening protocols, healthcare resource planning, and treatment guidelines across Europe and North America.EN

A Swedish study of 1.2 million people shows that long COVID patients face significantly higher risks of heart attacks, strokes, and arrhythmias compared to unaffected individuals. The finding extends beyond hospitalized cases to community-managed patients, reshaping how health systems and insurers should prepare for long-term cardiac complications.EN

Swedish researchers found that healthcare workers' emotional exhaustion during COVID-19 came less from the crisis itself than from organizational and societal timelines that moved on while the ICU remained in crisis mode. The mismatch between when managers, the public, and clinical staff thought the emergency should end created moral injury that traditional burnout interventions may miss.EN

A major multinational study reveals how diabetes is shifting the causes of death among people in high-income countries—moving beyond traditional heart disease concerns. The findings could reshape how insurers, healthcare systems, and public health agencies prioritize resources and prevention strategies.EN

Researchers found that elevated aldosterone levels—a condition often missed by doctors—significantly increase the risk of heart attacks, strokes, and heart failure in older people. The discovery could reshape screening practices and drug development, as millions may unknowingly carry this cardiovascular risk factor.EN

A phase 3 trial shows baxdrostat, an experimental aldosterone inhibitor, significantly lowers blood pressure in patients with resistant hypertension who remain uncontrolled on three or more medications. The finding could expand treatment options for millions with hard-to-treat high blood pressure and reduce cardiovascular disease risk in a population currently lacking effective alternatives.EN