Reich's brother died of tuberculosis (TB) in 1926, the same disease that had killed their father. Turner writes that a quarter of deaths in Vienna were caused by TB in the 1920s. Reich himself contracted it in 1927 and spent several weeks in the winter of that year in a sanitorium in Davos, Switzerland, where TB patients went for rest cures and fresh air before antibiotics became widely available around 1945. Turner writes that Reich underwent a political and existential crisis in Davos; he returned home in the spring angry and paranoid, according to Annie Reich. Some months later he and Annie were on the streets during the July Revolt of 1927 in Vienna, when 84 workers were shot and killed by police and another 600 were injured. It seems that the experience changed Reich; he wrote that it was his first encounter with human irrationality. He began to doubt everything, and in 1928 joined the Communist Party of Austria: