The interpretation of radiographs is critical for the detection of many diseases, specially in the thoracic part, which is where COVID-19 attacks. Many people around the world are suffering from this disease, because of the easy spread of the virus. In an attempt to help physicians in their diagnosis of COVID-19, since it can be seen from a frontal view chest radiograph, deep learning approaches have recently been introduced to deal with this detection task. The purpose of this work is to investigate how well current deep learning algorithms perform on the detection of COVID-19, and to give hints on how the approach can be used in the future on real clinical settings, to help professional radiologists.