T.B. Yoits wrote: “Again, if these are vaccines, why did the CDC change their definition?”
There was a time when vaccination were given by cutting the skin and inserting the infectious material. That’s how the cowpox was used to stop smallpox. Should we never update definitions to reflect modern techniques?
Read this:
https://www.verificat.cat/vaccines/entry/why-has-the-cdc-changed-the-definition-of-a-vaccine
T.B. Yoits wrote: “Again, if these are vaccines, why did the CDC change their definition?”
There was a time when vaccination were given by cutting the skin and inserting the infectious material. That’s how the cowpox was used to stop smallpox. Should we never update definitions to reflect modern techniques?
Read this:
https://www.verificat.cat/vaccines/entry/why-has-the-cdc-changed-the-definition-of-a-vaccine