Consuming very hot food and beverages poses a risk of oesophageal cancer. Although injury thresholds have been specified in industry standards and guidelines, there remain practical limitations in obtaining an exact measurement of the contact temperature from hot foodstuff in the oral mucosa inside the mouth. Dr Dirk Lachenmeier, a chemist and toxicologist at the Chemical and Veterinary Investigation Agency Karlsruhe, worked in collaboration with his father Dr Walter Lachenmeier, a retired engineer, to develop a new method to estimate the safe surface or consumption temperature of hot food. This has allowed them to make important recommendations.

Dr Brett Lidbury from the Australian National University worked with colleagues to utilise machine learning techniques in a new strategy to identify biomarkers that could be used to help diagnose myalgic encephalomyelitis/chronic fatigue syndrome in patients. Their work represents a significant step forward in understanding, diagnosing and treating this challenging condition, particularly in relation to pathology, the results of which form a routine but important part of general health assessment.

Italy was the first European country to experience a major outbreak of COVID-19. Across the country, intriguingly different patterns of mortality were seen across regions. Dr. Marzia Cremona from Université Laval, in collaboration with a global team of researchers from the Pennsylvania State University and the Sant’Anna School of Advanced Studies, used novel statistical tools from the field of functional data analysis (FDA) to identify several important factors contributing to these differences. This work has critical implications for policymaking and also demonstrates the useful application of FDA techniques to epidemiological research.

Maternal nutrition plays a major role in reducing pregnancy complications and improving infant and child health. Vitamin D is important during pregnancy as it helps the baby’s heart, bones, teeth and nervous system develop properly. Low levels of vitamin D in pregnancy have been linked to a number of problems and conditions. Dr Pal Bela Szecsi and his team at Copenhagen University Hospital in Denmark have been investigating vitamin D concentrations throughout normal pregnancy and in relation to possible complications.

Digital health interventions have the potential to revolutionalise the management of health information. Despite reduced costs and increased accessibility of technology across the world, the implementation of digital health technologies in low- and middle-income countries has been less than optimal. Dr Samantha Dolan at PATH and the University of Washington and her colleagues investigated the perceived facilitators and barriers to electronic immunisation registry implementation in Tanzania and Zambia, and provide important recommendations for future practice.

There are over 3,600 established cell lines from 150 different species that can be used for scientific and medical research. In two recent studies, Dr Ruth MacKinnon and her team from St Vincent’s Hospital in Melbourne used multiple molecular methods to investigate changes in the way the genes are organised in two types of these cells. They demonstrated the importance of using multiple complementary methods and found that these cells can continue to evolve in the laboratory. They also uncovered evidence of a previously unreported process called ‘centromere capture’ which may be involved in the evolution of cancer cells.

Epithelial tissue is a protective layer of cells bound together into thin sheets that coat the internal and external surfaces of major body organs. The largest is the epidermis – the outer layer of the skin. This sheet-like structure is integral to its function and is maintained by a complex scaffolding network called the extracellular matrix (ECM). Dr Jacopo Di Russo and his colleagues at the Interdisciplinary Centre for Clinical Research of the University Hospital of Aachen, Germany, have recently discussed the diverse nature of the ECM and its hugely unmet potential within bioengineering.

Swimming was one of the nine original Olympic sports in 1896, and to this day, remains one of the most popular competitive and recreational sports. However, methods to track the effect of training programmes and physiological changes in swimmers have lagged behind those of other sports due to difficulties caused by the aquatic environment. Dr Ben Jones and his team from the University of Essex have used a novel underwater near infrared spectrometer to monitor the effects of a training programme on muscle oxygenation in teenage swimmers.