ɪn nˈaɪntiːnhˈʌndɹɪd nˈaɪnti sˈɛvən, hɪz lˈæbɹətˌɔːɹi wʌz ˈɔːlsoʊ ɐmˌʌŋ ðə fˈɜːst tə dˈɛmənstɹˌeɪt ˌeɪtʃˌaɪvˈiː lˈeɪtənsi ænd dˈɑːkjuːməntᵻd ðɪ ɛɡzˈɪstəns ʌv ɹˈɛzɚvwˌɑːɹz ʌv lˈeɪtəntli ɪnfˈɛktᵻd sˌiːdˈiː fˈoːɹ sˈɛlz ɪn pˈeɪʃənts hˌuː ɐpˈɪɹd tə bˈiː "fˈʊli səpɹˈɛst" ˌɔn pˈoʊtənt ˌæntɪɹˌɛtɹoʊvˈaɪɚɹəl θˈɛɹəpi.
In 1997, his laboratory was also among the first to demonstrate HIV latency and documented the existence of reservoirs of latently infected CD4 cells in patients who appeared to be "fully suppressed" on potent antiretroviral therapy.