Tips. 1  A German z is normally pronounced like an English ts. 2  A German s is normally pronounced like an English z. 3  In German, an ig at the end of a word is somewhat pronounced as a light ch, almost like the h sound in the English word huge. A German v is normally pronounced like an English f. 2  An esset (Î²) normally sounds like an English ss. 3  The German 1(one) is written accentually, making it look like a 7. 4  Find a study group and practice the pronunciation and the spelling of the numbers.
In 1977, Dr Jonas Salk, who developed the first polio vaccine, testified along with other scientists that mass inoculation against polio was the cause of most polio cases throughout the USA since 1961.
CDC worked collaboratively with Dr. Jonas Salk, of the University of Pittsburgh, who developed the inactivated polio vaccine (IPV) in the early 1950s, and Dr. Albert Sabin, who developed the oral polio vaccine (OPV) in the early 1960s.DC worked collaboratively with Dr. Jonas Salk, of the University of Pittsburgh, who developed the inactivated polio vaccine (IPV) in the early 1950s, and Dr. Albert Sabin, who developed the oral polio vaccine (OPV) in the early 1960s.