The massive raise of COVID-19 cases all over the world is leading to unprecedented pressures on healthcare services. Growing evidence is highlighting that COVID-19 is a systemic condition that requires doctors with multiple expertise. Paediatricians are trained in these skills. Considering the issue of staff shortage that is facing every country in the world, and the complexity of COVID-19, paediatricians may represent an important source of ready and skilled specialists that can quickly translate the paediatric practice in the COVID-19 care. We report our experience of paediatricians engaged in the fight against COVID-19 within adult COVID-19 wards. In particular, we focus on the importance of a skill of some paediatricians in their clinical practice, namely the use of lung ultrasound which has also become fundamental in the management of adult patients with COVID-19, especially for some categories such as pregnant women.