Figure 3.

Omicron and Delta variants cycle threshold (Ct) values in upper respiratory samples.

(a) Ct values of Omicron and Delta from all samples with available Ct values (N gene) stratified by vaccination status. (b) Ct values of Omicron and Delta from samples collected 5 days or less from the onset of symptoms. For this analysis, samples from asymptomatic patients were not included. (c) Ct values of Omicron and Delta variants collected more than 5 days from the onset of symptoms. For this analysis, samples from asymptomatic patients were not included. Vax, fully vaccinated patients who didn't receive a booster dose (panel A only, Vax includes boosted patients); Unvax, unvaccinated; boost, patients with booster dose. Data shown as box and whisker plots, horizontal bars represent median Ct values, and total numbers per group are shown on top of each box.