dead-end hosts
... that humans and horses are dead-end hosts for the West Nile virus?
... that humans and horses are <b id="mwBYA"><a href="./Host_(biology)" id="mwBYE" rel="mw:WikiLink" title="Host (biology)">dead-end hosts</a></b> for the <a href="./West_Nile_virus" id="mwBYI" rel="mw:WikiLink" title="West Nile virus">West Nile virus</a>?