3 ms·
The word has changed in meaning. It used to be virus-oriented, but that has shifted; after all not all diseases are viral, such as Lyme, which once had a vax.
by thehappypm 4y ago
The word has changed in meaning. It used to be virus-oriented, but that has shifted; after all not all diseases are viral, such as Lyme, which once had a vax.
Now it really means a substance that can train the immune system to attack an antigen. Which is much broader but fundamentally the same.
- collyw 4y agoNah, it's been updated. It doesn't need to attack an antigen, just "produce an immune response". It doesn't matter if that immune response is for a virus that is long extinct, as long as the "vaccine" makes your body produce some antibodies.