Jonas Salk Quote

There are three stages of truth. First is that it can't be true, and that's what they said. You couldn't immunize against polio with a killed-virus vaccine. Second phase: they say, "Well, if it's true, it's not very important. And the third stage is, 'Well, we've known it all along."

Academy of Achievement interview (1991)

There are three stages of truth. First is that it can't be true, and that's what they said. You couldn't immunize against polio with a killed-virus...

There are three stages of truth. First is that it can't be true, and that's what they said. You couldn't immunize against polio with a killed-virus...

There are three stages of truth. First is that it can't be true, and that's what they said. You couldn't immunize against polio with a killed-virus...

There are three stages of truth. First is that it can't be true, and that's what they said. You couldn't immunize against polio with a killed-virus...