The SARS-CoV-2 pandemic has caused an unprecedented health and social crisis worldwide. In this paper we summarized the different therapeutic actions planned from the two sides of the Atlantic Ocean (USA and Europe) to fight the initial phase of COVID-19 pandemic, with an emphasis on passive immunotherapies such as convalescent plasma and anti-Spike monoclonal antibodies. The lessons derived from the critical analysis of that period could drive our treatment decisions for the next pandemics.