LAS VEGAS, NEVADA - SEPTEMBER 01: Senior student Ryan Doss heats test tubes to keep them sterile during an in-person Phage Discovery Laboratory course by life sciences professor Dr. Christy Strong at UNLV amid the spread of the coronavirus (COVID-19) on September 1, 2020 in Las Vegas, Nevada. Strong has two other classes of 50 and 250 students that she teaches remotely. To lower the number of people on campus to allow for social distancing because of the pandemic, the university moved fall 2020 courses with more than 50 students, about 80 percent of its classes, to remote instruction, with 20 percent of courses held in-person or hybrid. UNLV is only using large classrooms with spaced out seating and under 50 percent capacity for in-person classes, which are now staggered to reduce density on the campus. Ethan Miller/Getty Images/AFP == FOR NEWSPAPERS, INTERNET, TELCOS & TELEVISION USE ONLY ==