Highlights•Wolbachia-mediated blocking is density dependent in most associations and
tends to be greater in novel infections.•Immune priming is commonly seen in novelly-
infected vectors but not in native associations.•Competition between Wolbachia and the
virus for host resources leads to lesser viral infection and slower replication.•Wolbachia may
change host structures for its own gain that subsequently limit the ability to viruses to
replicate.Viruses transmitted by mosquitoes such as dengue, Zika and West Nile cause a …