There was no vaccine last summer, and now 70% of people in the United States have received at least one dose of the vaccine. According to CNBC television network, "Wall Street Journal" and other media reports, CDC Director Rochelle Walensky said at a White House briefing on the 2nd that the data collected by the CDC showed that the average number of new cases in the United States was 7 days on July 30. There were 72,790 cases per day, higher than the peak of 68,700 cases last summer.