Olivia Troye, Vice President Mike Pence's former homeland security, counterterrorism, and coronavirus adviser. Screenshot/Republican Voters Against Trump The top US infectious-disease expert, Dr. Anthony Fauci, praised the former aide to Vice President Mike Pence who is critical of the US coronavirus response, saying she was a "good person" who was "important" to the White House coronavirus task force. Olivia Troye served as Pence's homeland security adviser and his lead coronavirus staff member on the coronavirus task force until she stepped down in July. This week she became the first former task-force member to publicly condemn the Trump administration's handling of the COVID-19 pandemic. In an interview with MSNBC's Chris Hayes, Fauci declined to comment on the ad, but he described Troye as "important to the team." Visit Business Insider's homepage for more stories. The top US infectious-disease expert, Dr.