PREP already gives you good prevention for this to work it needs to be both a therapeutic vaccine at least at stages at which PEP is no longer effective as well

PREP already gives you good prevention for this to work it needs to be both a therapeutic vaccine at least at stages at which PEP is no longer effective as well and or as being at least as effective as PREP whilst being more cost effective as an overall treatment. Also there is no chance that this would have a higher adoption rate than COVID unless it turns out to give 100% life time immunity and would end up being part of the National vaccination program world wide. This likely would have the same usage as PREP/PEP today so at risk individuals and a post exposure treatment.