The greatest challenge for ageing populations is that vaccines can be less protective for the elderly due to the age-related decline of the immune system. This means that improving the efficacy of vaccines in the ageing population is crucial to public health. Dr Lei Jin and colleagues from the University of Florida set out to develop a novel strategy to directly address this key issue.

Traditional Chinese Medicine has been used in the treatment of disease for centuries, although its potency is often overlooked by researchers. Dr Yu-Ling Ma and colleagues in the Oxford Chinese Medicine Research Centre at the University of Oxford have focused on a multi-component herbal medicine called Xin Su Ning in the treatment of cardiac arrhythmia to elucidate the mechanism of action and pharmacological properties of its components.

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.