The malaria vaccine is the first vaccine produced against a parasite rather than a pathogen and if the efficiency rate is to hold this would result in a massive drop in cases and in mortality. Roughly 800,000 people a year die from Malaria per year and a 50% infection drop would halve that.
This is without the countless man hours and pain caused by this disease, remembering that there are roughly 225 million cases of malaria per year and that malaria is a serious disease. The sheer amount of money saved in medication and treatment will be astounding particularly since the people this will benefit the most will be the poorest nations of the world who normally don't have access to the best medication.
It will be a few more years before the vaccine is released but clinical trials are promising. This is 30 years of hard work that have come to fruition even if the immunity doesn't last long.