retrovirus

One could not have isolated this retrovirus without knowledge of other retroviruses, that's obvious. But I believe we have answered the criteria of isolation.

retrovirus, eretrovirus, 4retrovirus, 5retrovirus, tretrovirus, fretrovirus, eetrovirus, 4etrovirus, 5etrovirus, tetrovirus, fetrovirus, reetrovirus, r4etrovirus, r5etrovirus, rtetrovirus, rfetrovirus, rwetrovirus, r3etrovirus, r4etrovirus, rretrovirus, rsetrovirus, rdetrovirus, rwtrovirus, r3trovirus, r4trovirus, rrtrovirus, rstrovirus, rdtrovirus, rewtrovirus, re3trovirus, re4trovirus, rertrovirus, restrovirus, redtrovirus, rertrovirus, re5trovirus, re6trovirus, reytrovirus, regtrovirus, rerrovirus, re5rovirus, re6rovirus, reyrovirus, regrovirus, retrrovirus, ret5rovirus, ret6rovirus, retyrovirus, retgrovirus, reterovirus, ret4rovirus, ret5rovirus, rettrovirus, retfrovirus, reteovirus, ret4ovirus, ret5ovirus, rettovirus, retfovirus, retreovirus, retr4ovirus, retr5ovirus, retrtovirus, retrfovirus, retriovirus, retr9ovirus, retr0ovirus, retrpovirus, retrlovirus, retrivirus, retr9virus, retr0virus, retrpvirus, retrlvirus, retroivirus, retro9virus, retro0virus, retropvirus, retrolvirus, retrocvirus, retrofvirus, retrogvirus, retrobvirus, retro virus, retrocirus, retrofirus, retrogirus, retrobirus, retro irus, retrovcirus, retrovfirus, retrovgirus, retrovbirus, retrov irus, retrovuirus, retrov8irus, retrov9irus, retrovoirus, retrovjirus, retrovkirus, retrovurus, retrov8rus, retrov9rus, retrovorus, retrovjrus, retrovkrus, retroviurus, retrovi8rus, retrovi9rus, retroviorus, retrovijrus, retrovikrus, retrovierus, retrovi4rus, retrovi5rus, retrovitrus, retrovifrus, retrovieus, retrovi4us, retrovi5us, retrovitus, retrovifus, retrovireus, retrovir4us, retrovir5us, retrovirtus, retrovirfus, retroviryus, retrovir7us, retrovir8us, retrovirius, retrovirjus, retrovirys, retrovir7s, retrovir8s, retroviris, retrovirjs, retroviruys, retroviru7s, retroviru8s, retroviruis, retrovirujs, retroviruas, retroviruws, retrovirues, retroviruds, retroviruxs, retroviruzs, retrovirua, retroviruw, retrovirue, retrovirud, retrovirux, retroviruz, retrovirusa, retrovirusw, retroviruse, retrovirusd, retrovirusx, retrovirusz.