A phase I-II trial conducts preliminary safety and immunogenicity testing, is usually randomized, placebo-controlled, and conducted in multiple centers while determining more precise effective doses.
Jaribio la Awamu ya I-II inaendesha jaribio ya awali ya usalama na imunogenisiti, kikawaida halifuati utaratibu maalum, hudhibitiwa kupitia placebo na katika maeneo anuwai, huku likibaini dozi sahihi zaidi na faafu.