wˈʌn ɛɡzˈæmpəl kˈʌmz fɹʌmðə hjˈuːmən ˌɪnfluːˈɛnzə vˈaɪɹəs, wˌɪtʃ hˈæzbiːn ɪnvˈɑːlvd ɪn ɐn ɐdˈæptɪv kˈɑːntɛst wɪð hjˈuːmənz fɔːɹ hˈʌndɹɪdz ʌv jˈɪɹz.
One example comes from the human influenza virus, which has been involved in an adaptive contest with humans for hundreds of years.