Clark County Tuesday reported its first confirmed case of the omicron variant. Southern Nevada Health District says the case was recorded in a woman in her mid-20s, who is fully vaccinated but has not received a booster shot. The Health District advises. people can protect themselves from all variants of the COVID-19 virus by getting fully vaccinated and getting a booster, wearing a mask in public indoor settings, regardless of vaccination status, and staying home and getting tested if they are sick.