Existing Products. As the application of polysaccharide protein conjugate vaccine technology is limited to a subset of bacteria, there are a limited number of polysaccharide protein conjugate vaccines currently in use. Examples of successful polysaccharide protein conjugate vaccines are listed here.
Only seven African countries are not geopolitically a part of Sub-Saharan Africa: Algeria, Egypt, Libya, Morocco, Tunisia, Western Sahara (claimed by Morocco) and Sudan, they form the UN subregion of Northern Africa which also makes up the largest bloc of the Arab World.ub-Saharan Africa is, geographically, the area of the continent of Africa that lies south of the Sahara Desert.
The Sahel region, which borders the Sahara, is not a true desert but may become one as the Sahara advances southward. Arid lands on the edge of the Sahara in the Horn of Africa, such as the Ogaden Desert, consume portions of Eritrea, Ethiopia, Kenya, Somalia and the Sudan. Egypt's Nubian Desert and Ethiopia's Danakil Desert are also arid environments that might soon become Africa's next big desert. National Geographic: Desert Profile.