The study of reactions to SARS-CoV-2 vaccines has marked a large part of the literature in the last two years, using the basophil activation test (BAT) as a potential diagnostic tool for reactions to Covid-19 vaccines. In allergic rhinoconjunctivitis, lirentelimab (a humanised monoclonal antibody against lectin 8), reduces patients' symptoms and atopic comorbidities. In severe asthma, tezepelumab (human monoclonal antibody) reduces the annual asthma exacerbation rate over 52 weeks. In terms of diet, the new EAACI guidelines recommend avoiding cow's milk supplementation in infants during the first three days of life to reduce the risk of cow's milk allergy.