'In 1954 440,000 schoolchildren became guinea pigs in a test of his polio vaccine'
Salk
DOCTOR!: In 1954 440,000 schoolchildren became guinea pigs in a test of his polio vaccine
In 1954 440,000 schoolchildren became guinea pigs in a test of his polio vaccine
In 1954 440,000 schoolchildren became guinea pigs in a test of his polio vaccine
DOCTOR!
Salk
DOCTOR!