Sara Reardon: Kubas Impfstoffe halten offenbar, was sie versprechen (Cuba’s vaccines apparently deliver what they promise), in: Spektrum.de (25.11.2021).
In her article, the author describes the efficacy of Cuban vaccines: Soberana has a high efficacy of 92.4 percent in clinical trials. She also says the Abdala vaccine is similarly good.
Link to the article on Spektrum.de
Link to Sobreana 02 preliminary study on the pre-print server medRxiv6