Each retrovirus produces thousands of copies. They would spread and kill every cell in the body in a few days. I would like to see the math behind how this doesn't happen.
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "Homework questions are off-topic on Biology unless you have shown your attempt at an answer. For more information see our homework policy." – Remi.b, De Novo, AliceD
It's not a matter of math, it's a matter of biology. Even bacteria have an "immune system" of sorts that will degrade foreign RNA. The study of these bacterial immune systems was what led to the CRISPR/Cas system for genetic engineering. Most organisms have some analogue to DICER which attacks viral RNA.