Seattle has become the first U.S. city to fully vaccinate 70% of eligible residents. … Meanwhile, Denver has crossed the milestone of administering at least one dose of the COVID-19 vaccine to 70% of its population. … El Paso, Texas has also passed the milestone, with 72% of the county's eligible population aged 12 and up receiving at least one dose of the vaccine, according to the the state's vaccine dashboard. Some of the nation's largest cities, including San Francisco, San Jose and Boston, are also racing toward the threshold.