potency of both. >> yeah. good morning, christi. you know, yet another dangerous -- potentially dangerous variant to talk about. you see, the biggest concern scientists have about omicron are these increased number of mutations on the spike protein. the spike protein is key when it comes to the virus latching on and getting into our bodies. so the more mutations that you have on the spike protein, the more capable the virus is of infecting us and causing damage. but there's still unknown. even if omicron becomes a rather predominant strain here in the u.s., it still has to compete with delta, just as you mentioned. i'm not 100% sure that omicron can totally push delta to the side. i mean, just as you mentioned at the opening, we're a little over 100,000 daily case s, and our biggest concern in the u.s. still needs to be the delta variant. >> so talk about a timeline.