evidence: On Thursday, the Centers for Disease Control and Prevention said the "hypertransmissible" delta variant could have caused the recent 10 percent increase in new Covid-19 cases in the country. The news comes as states have largely abandoned mask mandates and reopened their economies, and as several states trail on vaccinations. The CDC said the country’s lagging vaccination rate, which is likely to miss President Joe Biden’s July 4 goal of getting at least one shot into the arms of 70 percent of adults, has contributed to the uptick in cases. [...] Here’s a quick look at the current state of the pandemic in the United States. The delta variant, first detected in India, now accounts for a quarter of all new cases in the U.S. The CDC said the strain is now in all 50 states and likely to become the dominant strain in the coming weeks.