SV 40 or simian virus 40 was found to contaminate polio vaccines from 1955 through 1963.
It is hardly the conspiracy that some folks make it out to be though and SV40 has not been linked to cancer.
For more information:
SV 40 or simian virus 40 was found to contaminate polio vaccines from 1955 through 1963.
It is hardly the conspiracy that some folks make it out to be though and SV40 has not been linked to cancer.
For more information: