childhood

Exposure to mild ozone air pollution during the first two years of life is linked to the development of asthma and wheezing in children between the ages of four and six, both individually and in combination with nitrogen dioxide and fine particles. This relationship was not found in children under eight or nine years old, according to a study published in JAMA Network Open. The epidemiological study is based on data from more than 1,000 children in the U.S.

Without urgent action and policy reforms, more than half of the world's adult population (3.8 billion) and a third of all children and adolescents (746 million) are expected to be overweight or obese by 2050. The figures are published today in The Lancet.

Toddlers' screen time has a negative correlation with their language skills, according to a study published in PLoS ONE. However, the use of educational content and screen time in the company of adults show a positive association with language skills. The study included nearly 1,900 children between one and four years old from 19 Latin American countries.

In the context of World AIDS Day, which is celebrated on 1 December, it is essential to reflect on one of the most urgent challenges in the fight against this disease: HIV in the paediatric population. A project led by the Complutense University of Madrid seeks to reduce paediatric mortality by training research leaders in sub-Saharan Africa and applying technology and innovation.

An analysis of the gut microbiota of children growing up on farms or with pets shows that early establishment of anaerobic commensal bacteria is associated with lower rates of allergy later in life. The study, which used data from 65 children aged between three days and 18 months, is published in the journal PLOS ONE. 

The restriction of sugar during the first 1,000 days of life, starting from gestation, may protect against diabetes and hypertension in adulthood, according to a study published in Science. The research uses data from sugar rationing implemented in the United Kingdom after World War II. The findings highlight the long-term benefits of reduced sugar intake during early development.

Global childhood immunisation coverage stagnated in 2023, with 2.7 million more children unvaccinated or under-vaccinated than at pre-pandemic levels in 2019. This is one of the data published by the World Health Organization (WHO) and UNICEF in the World Health Organization's Worldwide Estimates of National Immunisation Coverage (WUENIC), which captures global vaccination trends against 14 diseases. More than half of unvaccinated children live in 31 countries with fragile and conflict-affected environments. 

Both sex and gender are associated with distinct networks in the brains of boys and girls, according to an analysis of brain images of 4,757 children in the US. Understanding these neurobiological patterns is important for identifying how sex and gender influence health and for developing specific diagnostic tools, the research team writes in Science Advances.

A study published in the journal PLOS ONE, which includes data from over 3,000 Spanish adolescents and children, has shown that those living in more walkable areas report spending more minutes per day engaging in active transportation compared to those from less walkable neighborhoods. Along those lines, the lowest average minutes spent playing outdoors are observed among participants from neighborhoods with lower socioeconomic status and less walkability. The research is part of the PASOS study, coordinated by the Gasol Foundation.

Research involving more than 3,000 adolescents and children from all Spanish autonomous communities concludes that those living in less walkable neighbourhoods with lower socioeconomic status walk less and engage in less physical activity at weekends than those living in more walkable areas with higher socioeconomic status. The paper, published in the journal PLOS ONE and part of the PASOS study, was presented by two of its authors at a briefing organised by SMC Spain.