cases caused by the delta variant and more importantly now cases surging from the omicron variant. over the past month, we have seen the percentage of omicron cases increase and the percentage of delta cases decrease. based on cdc genomic sequencing, we now estimate that omicron represents about 95% of the cases in the country and delta represents the remaining 5%. the sharp rise in cases and the emergence of the more transmissible omicron variant emphasizes the importance of vaccinations and boosters. this week the fda made several vaccine authorizationtion, and cdc followed these authorizations by making additional vaccine recommendations. first, cdc authorized -- fda authorized and cdc recommended shortening the window in which people who receive the pfizer covid-19 vaccine can get a booster dose from six months to five months. second, fda authorized and cdc