rabbit flea
... that the rabbit flea is a vector for the virus that causes myxomatosis?
... that the <b id="mwDYA"><a href="./Spilopsyllus_cuniculi" id="mwDYE" rel="mw:WikiLink" title="Spilopsyllus cuniculi">rabbit flea</a></b> is a <a class="mw-redirect" href="./Vector_(epidemiology)" id="mwDYI" rel="mw:WikiLink" title="Vector (epidemiology)">vector</a> for the virus that causes <a href="./Myxomatosis" id="mwDYM" rel="mw:WikiLink" title="Myxomatosis">myxomatosis</a>?