Comment by goldenkey

The weak ones don't just eradicate, they hide dormant in the nerve cells. Your body produces antibodies which makes the blood titer close to 0. That doesn't mean you haven't been given a lifelong viral load that is now embedded in your ganglia.

This is the nature of viruses..like it or not.

And live vaccines are often used because they tend to be more effective.

To be clear, I am only talking about live vaccines. Protein/mRNA vaccines give you antibodies without the virus, and I have no qualms with them.