Jonas Salk Gallery
happydance
occeus coliad
inthemembrane
ifsamerkezihijab
withmyfamily
Fun History FactWhen Dr. Jonas Salk invented the polio vaccine, he refused to patent the vaccine cit
historycultureeducation: Jonas Salk didn’t patent his 1955 polio vaccine so that it would be afforda
Mothers line up outside a school for their children to receive the trial polio vaccine (USA, 1955).
cracked: He doesn’t get a holiday but Rutherford B. Hayes does? 22 Inspiring Acts of Kindness
Prev
Next