I mean, the CONFIRM trial (https://www.research.va.gov/currents/1117-Largest-ever-VA-clinical-trial.cfm https://www.research.va.gov/currents/1117-Largest-ever-V

I mean, the CONFIRM trial (https://www.research.va.gov/currents/1117-Largest-ever-VA-clinical-trial.cfm https://www.research.va.gov/currents/1117-Largest-ever-VA-cl...) had 50,000 patients. (That's not a pharmaceutical sponsor-led clinical trial, but it is a clinical trial.) But yes, the largest phase 3 trials ever are generally vaccines. https://www.evaluate.com/vantage/articles/news/snippets/its-official-covid-19-vaccine-trials-rank-among-largest https://www.evaluate.com/vantage/articles/news/snippets/its-...