The Spread of Vaccine-Derived Polio
The historical record of the enterovirus poliovirus traces as far back as 1580 B.C.1 The modern record began in 1879 when the clinical effects of the poliovirus were first described by British physician Dr. Michael Underwood. By 1840, Dr. Jacob von Heine had developed the theory that the disease may be contagious. More than 50… Read More »