The Canadian Arctic - Especially Nunavut. There are several islands in the region which are larger than some states in the United States. One of them (Devon Island) at 21k square miles, is the largest uninhabited island in the world. The Guiana Highlands/Shield (South America) - Some the most remote and mountainous rain forest on Earth.
Oral polio vaccine (OPV). The oral polio vaccine (OPV) was developed in 1961 by Albert Sabin. Also called âtrivalent oral polio vaccineâ or âSabin vaccineâ, OPV consists of a mixture of live, attenuated (weakened) poliovirus strains of all three poliovirus types.The oral polio vaccine is simple to administer. A few drops, given multiple times, can protect a child for life.ral polio vaccine (OPV). The oral polio vaccine (OPV) was developed in 1961 by Albert Sabin. Also called âtrivalent oral polio vaccineâ or âSabin vaccineâ, OPV consists of a mixture of live, attenuated (weakened) poliovirus strains of all three poliovirus types.
Description. There are three known types of polioviruses (called 1,2, and 3), each causing a different strain of the disease and all are members of the viral family of enteroviruses (viruses that infect the gastrointestinal tract).he Sabin vaccine (also called the oral polio vaccine or OPV) is given to infants by mouth at the same intervals as the DPT (three doses). It contains the live, but weakened, poliovirus, which make the recipient immune to future infections with poliovirus.