In 1921, Wagner-Jauregg reported impressive success and many other physicians attempting malaria induced pyrotherapy made similar claims.[6] Later analyses have shown this might not have been true since approximately 60% would relapse within 2 years and 3–20% have died from the resulting fevers.[6] Significant consideration should be used here, as syphilis was considered deadly and without other treatment options pyrotherapy was a lesser of two evils.[citation needed]