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Atopic diseases are the most common chronic conditions of childhood. The apparent rise in food anaphylaxis in young children over the past three decades is of particular concern, owing to the lack of proven prevention strategies other than the timely introduction of peanut and egg.

Ensitrelvir, a 3C-like protease inhibitor, received emergency approval in Japan in November 2022 for treating non-hospitalized patients with mild-to-moderate COVID-19. However, confirmation of its real-world clinical effectiveness is limited.

In this review, we provide an overview of food allergy genetics and epigenetics aimed at clinicians and researchers. This includes a brief review of the current understanding of genetic and epigenetic mechanisms, inheritance of food allergy, as well as a discussion of advantages and limitations of the different types of studies in genetic research. 

The twenty-first century has seen a fundamental shift in disease epidemiology with anthropogenic environmental change emerging as the likely dominant factor affecting the distribution and severity of current and future human disease. This is especially true of allergic diseases and asthma with their intimate relationship with the natural environment.

Food allergy affects families' quality of life, can be lifelong and life-threatening, urging the identification of early modifiable risk factors. Formula feeding in the first days of life may increase the risk of cow's milk allergy, a risk often attributed to cow's milk allergens exposure. Early formula feeding also reduces the colostrum intake, the first 3 days' milk, which is rich in bioactive compounds critical for immune and gut health. This study investigates whether partial colostrum feeding increases the risk of food allergy beyond cow's milk.

Allergic sensitization and reduced ability to respond to viral infections may contribute to virus-induced wheeze and asthma development in young children. Plasmacytoid dendritic cells (pDC) are rare immune cells that produce type I interferons (IFN-I) and play a key role in orchestrating immune responses against viruses. 

Meta-analyses of randomized controlled trials have found that introducing eggs and peanuts earlier during infancy reduced egg and peanut allergy risk. Hence, infant feeding advice has dramatically changed from previous recommendations of avoidance to current recommendations of inclusion of common food allergens in infant diets.

Cow's milk allergy is rare in exclusively breastfed infants. To support the continuation of breastfeeding an infant after diagnosis with a cow's milk allergy, it is critical to examine the evidence for and against any form of cow's milk elimination diet for lactating mothers. In this narrative review, we highlight the lack of high-quality evidence, hence subsequent controversy, regarding whether the minuscule quantities of cow's milk proteins detectable in human milk cause infant cow's milk allergy symptoms.

Peanut allergy is the most common childhood-onset, persistent food allergy. Peanut oral immunotherapy (OIT) is a potential treatment, but few studies prospectively examine the outcome of peanut OIT in young children using parent-measured doses compared to standard care (peanut avoidance).

Human milk is rich in immuno-modulatory factors that have the potential to shape immune development and influence allergy risk in children. In this article, we describe how breast milk may contribute to making the infant less prone to developing allergies.