There's nothing to identify - it's a serum containing three monoclonal antibodies. These antibodies bind some viral proteins, preventing the virus from infectin

There's nothing to identify - it's a serum containing three monoclonal antibodies. These antibodies bind some viral proteins, preventing the virus from infecting new cells and spreading. To my knowledge there's no path from this to a vaccine, which prepares the human immune system to recognize and fight viral infection itself. Unfortunately, monoclonal antibodies (mAbs) are still very expensive to manufacture, distribute, and use as treatment for disease, meaning this will not broadly impact outcomes in rural Africa (barring advances in mAbs technology).