Children's (in)visibility in social vulnerability and the impact of the novel coronavirus (COVID-19).

Objective: To examine the impact of the infection by the novel coronavirus on Brazilian children in situation of social vulnerability based on the Millennium Sustainable Development Goals.
Method: Reflective study based on discursive formulation in three aspects: principles of the objectives and goals for the millennium sustainable development; impact of the pandemic on the health of children and their families living in social vulnerability; and the role of pediatric nursing in the care provided - limits and challenges.
Results: In January 2020, the news of COVID 19 is released as a pandemic. In Brazil, children and families are still without access to basic rights, thereby increasing their risks of social vulnerability because of the quarantine. The nursing field has an important role in monitoring children and their families, offering guidance in search for solutions and preventing contamination.
Conclusion: There are still challenges to be overcome by the children and their families in situations of vulnerability against COVID-19.