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Recent data suggest that adults may experience long-term symptoms after COVID-19 infection, but if such symptoms also occur in children is still unknown. Children tend to have milder COVID-19 than adults, but in a case-report from Sweden, Professor and pediatrician Jonas F Ludvigsson describes five children with potential “long COVID”. These findings, together with a systematic review of long COVID in children, are published in the journal Acta Paediatrica.

A new study has found that a commonly prescribed anti-depressant may halt growth of a type of cancer known as childhood sarcoma, at least in mice and laboratory cell experiments. The findings, from researchers at Karolinska Institutet in Sweden and MD Anderson Cancer Centre in Texas, ignite hope of novel treatment strategies against this disease. The study is published in the journal Cancer Research.

Researchers at Karolinska Institutet and Science for Life Laboratory in Sweden and Tor Vergata University of Rome in Italy have mapped the immune response in children affected by a rare but life-threatening inflammatory syndrome associated with COVID-19. The study, which is published in the scientific journal Cell, reveals that the inflammatory response differs from that in Kawasaki disease and severe acute COVID-19.

Two recent studies were unable to rule out that H1N1 (“swine flu”) vaccination (“Pandemrix”) and seasonal influenza vaccination given to pregnant women might be associated with autism spectrum disorder in the offspring. Now, a large study by researchers at Karolinska Institutet in Sweden, published in the journal Annals of Internal Medicine, refutes any such association.

Professor Jonas F Ludvigsson, at MEB, KI has been appointed national scientific expert in pediatrics at the Swedish National Board of Health and Welfare.

The vitality of preterm infants should be assessed with an Apgar score, a tool used to measure the health of newborns immediately after birth. That is the conclusion by researchers at Karolinska Institutet in Sweden who in a large observational study examined the value of Apgar scores for preterm infants. The findings are published in the New England Journal of Medicine.

It is highly likely that children can transmit the new coronavirus, which causes COVID-19, but several factors suggest that children are unlikely to be the main drivers of the pandemic. Opening up schools and kindergartens is unlikely to impact COVID-19 mortality rates in older people, according to a systematic review that spanned 47 publications and was conducted by researchers at Karolinska Institutet. The paper is published in the scientific journal Acta Paediatrica.

Only about five per cent of the babies born to mothers with hepatitis C are themselves infected by the disease. A possible reason for this low figure is that the baby’s immune system has already destroyed the virus before birth. A new study from researchers at KI and published in tje journal Gut reveals clear adaptations of the uninfected babies’ immune system that can lead the way to new treatment methods.

Children of parents suffering from mental illness have a higher risk of injuries than other children, according to a study by researchers at Karolinska Institutet in Sweden, published in the journal BMJ. The risk is elevated up to 17 years of age and peaks during the first year of life. The findings highlight the need for parents with mental illness to receive extra support around child injury prevention measures as well as early treatment of mental morbidity among expecting parents.

Two new studies from Karolinska Institutet in Sweden underscore health risks associated with childhood obesity. Children with obesity have a three times higher risk of mortality in early adulthood compared with children in the general population and are more likely to suffer from anxiety and depression. The findings, published in PLOS Medicine and BMC Medicine, highlight the need to identify specific risk factors for children with obesity and find preventative tools, say the researchers.

Researchers from Karolinska Institutet led by Professor Erik Melén have together with an international team mapped the relationship between length of pregnancy and chemical DNA changes in more than 6,000 newborn babies. For each week's longer pregnancy, DNA methylation changes in thousands of genes were detected in the umbilical cord blood (Figure 1).

Babies regularly treated with bath oil and skin cream are no more protected from developing atopic eczema than other babies, according to a study at Karolinska Institutet in Sweden and the University of Oslo in Norway. Early complementary introduction of certain foods to breastfeeding also failed to reduce the presence of atopic eczema during the first 12 months. The findings are published in The Lancet.

Children conceived with assisted reproductive techniques have a somewhat higher mortality risk during their first weeks of life than children conceived naturally, according to a study from Karolinska Institutet in Sweden, published in the journal Fertility and Sterility. The researchers link the increased risk to a higher degree of premature births in IVF-conceived children. The risk of infant mortality is still very small for both groups and after 1 year of age there is no difference.

Babies born with low birth weights are more likely to have poor cardiorespiratory fitness later in life than their normal-weight peers. That is according to a study by researchers at Karolinska Institutet in Sweden published in the journal JAHA. The findings underscore the importance of prevention strategies to reduce low birth weights even among those carried to at term delivery.

Inducing labor after 41 instead of 42 full weeks of pregnancy appears to be safer in terms of perinatal survival, according to new research from the University of Gothenburg, Sahlgrenska and Karolinska Institutet in Sweden. The current study is expected to provide a key piece of evidence for upcoming decisions in maternity care.

Pregnant women with eating disorders should undergo extended pregnancy screenings considering their increased risk of complications. That is the conclusion from a study by researchers at Karolinska Institutet in Sweden published in the journal JAMA Psychiatry. The researchers were, for example, able to show that children to mothers with eating disorders had an increased risk of premature birth and being born with a small head circumference.

Children who have received radiotherapy for a brain tumour can develop cognitive problems later in life. In their studies on mice, researchers at Karolinska Institutet have now shown that the drug lithium can help to reverse the damage caused long after it has occurred. The study is published in the journal Molecular Psychiatry and the researchers are now planning to test the treatment in clinical trials.

Children who suffer mild brain injury due to oxygen deprivation at birth normally do not receive cooling therapy to reduce the risk of permanent damage. Now, researchers at Karolinska Institutet and University College Cork report that these children have significantly impaired cognitive outcomes at 2-3 years of age and therefore should be included in future clinical trials of neuroprotective therapies. The study is published in JAMA Pediatrics.

Researchers at Karolinska Institutet have followed children who have sought emergency care for wheezing during their first years of life and found specific biomarkers that can predict the need for asthma medication several years later. The study is published in the prestigious European Respiratory Journal.

Children are more likely to have higher systolic blood pressure by age six if their mom used the Swedish powdered tobacco product snus during pregnancy. This according to a new study by researchers at Karolinska Institutet published in the Journal of the American Heart Association.

On October 7, Dr Jonas F Ludvigsson will make his first appearance as the ”in-house pediatrician” of Swedish television TV4. He will participate regularly in the television show ”Malou efter tio” to discuss health and disease in children.

Hi there Kevin Baker, doctoral student at the Department of Public Health Sciences at Karolinska Institutet. Today Friday 20 September you will defend your thesis. Tell us, what is the main focus of your thesis?

Children with Inflammatory Bowel Disease (IBD) run a greater risk of psychiatric disorders, according to a new study from Karolinska Institutet in Sweden published in JAMA Pediatrics. The researchers claim that more psychological support and longer follow-up is needed for the children affected and their parents.

The survival rate among extremely preterm babies has greatly improved in Sweden, a country that offers top-class neonatal care, a study led from Karolinska Institutet published in the esteemed journal JAMA reports.

In a report written on behalf of the Swedish National Board of Health and Welfare, researchers at Karolinska Institutet have concluded that the risk of suicide among unaccompanied refugee minors and young adults in 2017 was nine times higher than the equivalent figure for the same age group in the Swedish population.

An infant’s scores on the so-called Apgar scale can predict the risk of a later diagnosis of cerebral palsy (CP) or epilepsy. The risk rises with decreasing Apgar score, but even slightly lowered scores can be linked to a higher risk of these diagnoses, according to an extensive observational study by researchers at Karolinska Institutet published in The BMJ.

In the spring of 2016, KI researcher Tore Curstedt was nominated for a Lifetime Achievement Award by the European Patent Office for having devoted his life to Curosurf, a drug that has helped to activate the lungs of millions of preterm babies.

A gene that is often lost in childhood cancer plays an important role in the decision between life and death of certain cells, according to a new study published in the journal Developmental Cell. Researchers at Karolinska Institutet and Ludwig Cancer Research in Sweden have discovered the process by which that gene, KIF1B-β, kills cells and thereby suppresses tumour development.