Immutep Ltd. announced strong median overall survival of 17.6 months in cohort B of the TACTI-003 (Keynote-PNC-34) phase IIb trial that evaluated eftilagimod alfa in combination with Merck & Co.’s Keytruda (pembrolizumab) as first-line therapy in recurrent/metastatic head and neck squamous cell carcinoma in patients with PD-L1 expression below 1.