Safety analyses yielded genetically supported, hypothesis-generating signals with effect sizes close to unity, including associations between JAK2 inhibition and pulmonary embolism (OR = 0.998, p = 0.035) and tuberculosis (OR = 1.004, p = 0.013), as well as TYK2 inhibition and malignant non-melanoma skin cancer (OR = 1.006, p = 0.047), and lung cancer (OR = 1.002, p = 0.029). The gene discussed is TYK2; the disease is lung cancer.