...They may infect others directlyor they may scatter the virus about, and the surroundings may become a futuresource of infection for healthy animals... 
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...It is regarded as safe practice to use onlyspore-destroying substances for the virus of those diseases of which we have nodefinite knowledge...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...The virus may be transmitted in a variety of ways, both direct and indirect,from sick to healthy animals...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...Of late tubercular disease of the udder in cows () has received considerable attentionfrom sanitarians, owing to the infection of the milk with the virus oftuberculosis...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...By vaccination we understand the injection of a minute amount ofattenuated—that is, artificially weakened—blackleg virus into thesystem...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...This virus is obtained from animals which have died from blackleg, bysecuring the affected muscles, cutting them into strips, and drying them in theair...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...That frictions, with the hands impregnated with virus, having been madeover the skin, did not produce any ill effects...
Honoré Bourguignon 「On the cattle plague: or, Contagious typhus in horned cattle. Its history, origin, description, and treatment」
...And we cannot but feel that, if thecholera should reach the shores of England at this critical conjuncture,it will find organisms most ready to receive its virus...
Honoré Bourguignon 「On the cattle plague: or, Contagious typhus in horned cattle. Its history, origin, description, and treatment」
...In a word, to sow virus is to reap it; but there are many ways of sowingit, and one man will reap a rich harvest, whilst another shall gathernothing but tares...
Honoré Bourguignon 「On the cattle plague: or, Contagious typhus in horned cattle. Its history, origin, description, and treatment」
...The virus of my contriving excels the scorpion's...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
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informers choirmaster sampling
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