There have been some clinical trials of the M-001 and H1ssF_3928 universal influenza vaccine candidates. As of August 2020, all seven M-001 trials are completed. Each one of these studies resulted in the conclusion that M-001 is safe, tolerable, and immunogenic. Their pivotal phase 3 study with 12,400 participants has also been completed and results of data analysis were published in October 2020, unfortunately indicating that the vaccine did not show any statistical difference from the placebo group in reduction of flu illness and severity.