<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Phage_therapy" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Phage_therapy</a><p>Felix d&#x27;Hérelle &quot;quickly learned that bacteriophages are found wherever bacteria thrive: in sewers, in rivers that catch waste runoff from pipes, and in the stools of convalescent patients.&quot;