Breastfeeding mothers were excluded from the clinical trials conducted for vaccines against SARS-CoV-2. Since the start of the vaccination, some doubts have arisen regarding its compatibility with breastfeeding. The aim of this study was to analyse the presence of anti-SARS-CoV-2 antibodies in breast milk and serum (IgG and IgA) of vaccinated breastfeeding women. The main variables of the observational study were: adverse related events after vaccination and determination of the presence of IgG and IgA isotypes antibodies in serum and in breast milk of vaccinated women against the SARS-CoV-2 antigens. Results: 110 breastfeeding mothers were included; 70 women (63.6%) were vaccinated with two doses of BNT162b2, 20 women (18.2%) with two doses of mRNA-1273, and 20 women (18.2%) with a single dose of ChAdOx1-S. Regarding adverse reactions and vaccine safety, 38 women had no adverse reactions; 20 (18.2%) had general malaise or adenopathies; 10 (9.1%) had a headache; and 7 (6.4%) had fever. When analysing IgG antibodies, significantly higher levels of antibodies were found in serum and breast milk from mothers vaccinated with BNT162b2 or mRNA-1273 vs. ChAdOx1-S (p < 0.001 and p = 0.001, respectively). Analysing IgA antibodies, significant differences were found when comparing mean values in serum from mothers vaccinated with BNT162b2 or mRNA-1273 vs. ChAdOx1-S (0.12, 0.16, and 0.02, respectively; p < 0.001) and breast milk of mothers vaccinated when comparing BNT16b2 vs. ChAdOx1-S. All vaccinated breastfeeding mothers had serum anti-S1 IgG antibodies in response to vaccination against SARS-CoV-2, regardless of the commercial vaccine administered. Conclusions: the anti-SARS-CoV-2 vaccines were well tolerated by the mothers and the breastfed infant. In addition, breastfeeding mothers offer their infants IgA and IgG isotype antibodies directed against SARS-CoV-2 protein S in breast milk.

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<p><em><strong>Español</strong></em></p><p>En las últimas décadas ha aumentado el número de publicaciones sobre programas de entrenamiento socioemocional y se consideran como factores protectores que facilitan la adaptación de la persona al contexto y favorecen un mejor afrontamiento ante diferentes situaciones de la vida, así como ante situaciones de estrés. El objetivo del presente trabajo fue realizar una revisión sistemática de programas de entrenamiento socioemocional realizados en niños y adolescentes con el fin de seleccionar los más apropiados. El proceso de búsqueda se efectuó a partir de las bases de datos: PsycInfo, MedLine, ERIC, Red de Revistas Científicas de América Latina y El Caribe, Scielo, PUBMED, con palabras claves en inglés y español. Los resultados muestran que, de los 19 artículos que fueron seleccionados por cumplir con los criterios, se identificaron 17 programas de entrenamiento, la mayoría realizados en España y en el período 2011-2015. Los objetivos fueron, en mayor medida, destinados a entrenar la inteligencia emocional, seguido por los entrenamientos mixtos y en menor medida los destinados a entrenar las habilidades sociales. Se identificaron las técnicas empleadas en estos programas, la duración promedio de las intervenciones, la modalidad de aplicación, los administradores y los destinatarios. Por último, del total de los estudios analizados, la mayoría evidencia efectividad del entrenamiento para algunas de las variables analizadas. La evidencia presentada puede ser de utilidad para investigadores y profesionales del área de la salud y la educación que trabajen con niños y adolescentes.</p><p><em><strong>English</strong></em></p><p>In recent decades the number of publications on social-emotional training programs has increased, achieving consideration as protective factors that facilitate the adaptation of the individual to their context and allow better coping with different life situations, as well as of stressful situations. The objective of the present study was to perform a systematic review of social-emotional training programs in children and adolescents in order to select the most appropriate ones. The search process was carried out in the following databases: PsycInfo, MedLine, ERIC, Red de Revistas Científicas de América Latina y el Caribe, Scielo, PUBMED, with key words in English and Spanish and certain inclusion criteria. The results showed that of the 19 articles that were selected because they met the criteria, 17 training programs were identified, most of them carried out in Spain during the 2011-2015 period. The objectives of these training programs were to a greater extent, adapted to emotional intelligence, followed to a lesser extent by mixed training. The techniques used in these programs were identified, together with the duration of the interventions, the mode of application, the administrators and the recipients. Finally, of the total studies analyzed, most evidenced the effectiveness of training for some of the variables analyzed. The evidence presented may be useful for researchers and professionals in the area of health and education who work with children and adolescents.</p>

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