This question and the following sentence seems like a non-sequitur. 1) What does CRISPR have to do with mutating a cell receptor to bind with coronavirus? 2)

This question and the following sentence seems like a non-sequitur. 1) What does CRISPR have to do with mutating a cell receptor to bind with coronavirus? 2) Why, dear god, would you want to get a cell receptor to bind to coronavirus (wouldn't this just increase uptake of the virus into the cell)? 3) What is KAV-1 specifically? I can't find it at NCBI. 4) "I believe we can train their immune system to recognize future virus mutations." Okay? 5) What do chickens have to do with coronaviruses?