Coronavirus disease (COVID-19) and the critical role of healthcare professionals: a systematic review - Azevedo-Silva, Lucas José de; Sales-Peres, Matheus de Carvalho; Sales-Peres, André de Carvalho; Borges, Ana Flávia Sanches; Sales Peres, Sílvia Helena de Carvalho (Acta Scientific Medical Sciences, 2021)