According to the U.S. Centers for Disease Control and Prevention on Monday, 70-percent of American adults have now received at least one shot of a COVID-19 vaccine.
While the latest milestone is a month after President Biden's initial Fourth of July goal, the achievement is seen by federal health officials as a crucial step toward the U.S. reaching herd immunity.
Experts also say that, while the milestone is a significant step forward, it should be seen a floor, rather than a ceiling, especially as the Delta variant continues to rage across the U.S.
However, according to Dr. Paul Offit, a voting member of the FDA's Vaccines and Related Biological Products Advisory Committee, at least 80-percent of the population need to be vaccinated to truly reach some form of herd immunity.
Others say that, while the 70-percent mark is noteworthy, local communities with lower vaccination rates remain a concern.
Meanwhile, new data from the Kaiser Family Foundation shows that, so far, less than one-percent of fully vaccinated people have experienced a breakthrough infection.
Also, data from the CDC shows under point-zero-zero-four percent of people who have been fully vaccinated have experienced a breakthrough case that resulted in hospitalization, and less than point-zero-zero-one percent died from the virus.
So far, the authorities say there have been about 66-hundred breakthrough cases out of more than 164 million fully vaccinated Americans.
Analysis also shows more than 90-percent of cases, and more than 90-percent of hospitalizations and deaths have occurred among unvaccinated people, with most states reporting more than 98-percent of COVID-19 cases being those who haven't had a vaccine.
Lee Seung-jae, Arirang News.