The World Health Organization (WHO) approved a second malaria vaccine last week. The decision could offer a less costly and readily available shot to help fight the disease. Britain’s Oxford University developed the new three-shot vaccine along with the Serum Institute of India. Research suggests it is more than 75 percent effective. The vaccine can protect people for another year with an additional shot called a booster. Tedros said the shot would cost about $2 to $4 and could be available in some countries next year. Earlier this year, health officials in the African countries of Ghana and Burkina Faso also approved the vaccine. The WHO approved the first malaria vaccine in 2021. The U.N. agency described the vaccine development as an “historic” effort to end the deadly disease in Africa. The continent is home to most of the world’s estimated 200 million malaria cases and 400,000 malari...