Cold War tensions and the polio vaccine a serious threat in parts of Pakistan, Afghanistan, and Nigeria. Cold War tensions and the polio vaccine Polio (Infantile paralysis or poliomyelitis) epidemics were a concern during the summer months for children globally, with records of polio from the Egyptians and Greeks to the 1950s epidemics. In the summer of 1921, this epidemic became notorious when Franklin Delano Roosevelt, the Democratic contender for the vice presidency, was struck down by polio at the age of 39. Two U.S. virologists, Jonas Salk of the University of Pittsburgh and Albert B. Sabin of the University of Cincinnati emerged as the most prominent
Salk Salk A salk () is a small military unit led by a senior soldier that is subordinate to an infantry squad. "Salk" is bigger than a lahingpaar ("fire and maneuver team") but smaller than a jagu ("squad"). It is also one of the smallest military formation among the Estonian Ground Force infantry units. It usually consists of three to five soldiers, and may be further subdivided into fire and maneuver teams. A "salk" is composed of two fire and maneuver teams of two soldiers each, as well as a fireteam leader ("salgapealik") who is usually a corporal ("kapral"). One single