You should check out clinicaltrials.gov more often
Post# of 148177
I decided to pull up covid-19 trials, phase 2. Here are the patient numbers for the first ten trials , at least 6 out of the 10 aren't sized for statistical significance.
106, 390, 28, 1,500 I-SPY trial using 7 different drugs, 336, 10, 180, 131, 58, 3,217