After worrisome increases in COVID-19 cases in the U.S. in recent weeks, there are encouraging signs the situation is beginning to stabilize, according to remarks from Centers for Disease Control and Prevention Director (CDC) Dr. Rochelle Walensky earlier this week. During a briefing on Tuesday, she noted new reported cases fell by 21 percent over the past week, with the most recent seven-day average coming in at just over 54,400 cases per day. Walensky called the figure "a really hopeful decline." Hospitalizations also fell by 9 percent, with an average of more than 5,100 hospital admissions per day over the past seven days. Walensky partly attributed the recent trends to the ongoing nationwide vaccination campaign. "Each day more and more Americans are rolling up their sleeves and getting vaccinated, and likely contributing to these very positive trends," she said. The CDC director's optimism stands in stark contrast to her remarks one month ago, when she warned of "impending doom" and pleaded for continued vigilance as COVID-19 cases rose steadily in the U.S., as WaterISAC reported on in the March 30 Security & Resilience Update. Still, Dr. Walensky warned that “the virus is an opportunist” and could strike in communities with low vaccination rates.