Show One Step in in Putting Puffing Freeze on Polio i F Fa I a s a z I I I J T TI i ti Heres Here's one of the steps In preparation of gamma the globulin globulin the blood I fraction which scientists supported by March of Dimes found gives a degree of temporary protection against paralytic polio Approximately children took part In field trials which established GG asi as the first substance to counteract polio Workers here are placing trays I of GG In the freezes freezer where It is frozen solid before the next operation |