UNLV has updated its guidance on quarantine/isolation protocols if you have tested positive for COVID-19 or been in close contact with someone who has (https://www.unlv.edu/coronavirus/staff):
If you have tested positive for COVID-19, you must isolate (stay home) so that you don’t spread your illness to others. According to CDC guidance, you must isolate for at least five days. You may leave isolation after five days if you had no symptoms or your symptoms are improving and you have been fever-free for 24 hours. If you still have a fever after five days, you should remain in isolation for up to ten days until you have been fever-free for 24 hours. If you have severe disease, you should remain in isolation for ten days. If you leave isolation before ten days, you should wear a mask at all times when you are around others, avoid being around people at high risk, and avoid travel until a total of ten days have passed.
If you have been in close contact (within 6 feet of someone for a total of 15 minutes or more in a 24-hour period) with someone who has COVID-19, you may need to quarantine after your exposure. If you are unvaccinated, have not completed your initial vaccination series, or completed the series more than 5 months ago but have not been boosted, you should quarantine for five full days after the exposure. If you have completed the initial series in the last five months, have received a booster, or have tested positive for COVID-19 in the past 90 days, you do not need to quarantine after the exposure. In all cases, you should watch for symptoms for ten days and isolate yourself immediately if you become sick. You should also wear a mask at all times when you are around others, avoid being around people at high risk, and avoid travel until a total of ten days have passed.