COVID-19 impact on oncology clinical trials: a 1-year analysis

During the early peak of the COVID-19 pandemic, in March–April 2020, we assessed the impact of COVID-19 on oncology clinical trials by surveying key opinion leaders around the world and by exploring internal databases (Nat. Rev. Drug Discov. 19, 376–377; 2020). In this follow-up analysis, we have taken a targeted look at the cumulative impact of COVID-19 on oncology clinical trials around the world in the past year from April 2020 to March 2021.