New York City botched its COVID-19 response, according to an investigation conducted by Scott Stringer, the city's comptroller, who released findings from his inquiry Wednesday.

According to Stringer, key emergency response agencies, including the health department and the NYPD, were intentionally excluded from communications and decision-making "when time was of the essence."

The comptroller also described persistent confusion about the chain of command between agencies and a significantly delayed response to the pandemic.

Officials waited until late February to even begin planning for a worst-case scenario, despite knowing about the impending crisis in January. Stringer called on the mayor, as well as the future mayor, to conduct a thorough review of the city's emergency planning process.

"We cannot erase the mistakes of the past," he said. "But we can make sure we are prepared for future emergencies."

-ABC News' Aaron Katersky

A new CDC analysis found that Pfizer and Moderna vaccine efficacy dropped "significantly" among nursing home residents from March to July, as the delta variant became the predominant strain in the United States.

Researchers analyzed weekly reports from thousands of nursing home facilities in the U.S. and found that mRNA vaccines were roughly 75% effective against preventing any infection in late winter/early spring of 2021, early in the mass vaccination rollout and prior to the emergence of the delta variant. By summer of this year, effectiveness against any infection had dropped to 53%.

Crucially, this doesn't mean vaccines aren't working for nursing home residents, but the significant drop in effectiveness from March to July may support the use of booster doses for them, according to the CDC report.

A second analysis found that the mRNA vaccines are holding up well against hospitalizations for COVID-19. The research, which was conducted across 21 U.S. hospitals, found that the Pfizer and Moderna vaccines remained between 84% and 86% effective against potential hospitalizations from March to July of this year. A third analysis, conducted in New York State, found that all three authorized vaccines remained more than 90% effective at preventing hospitalization from early May to late June.

-ABC News' Sony Salzman, Eric Strauss

The U.S. is prepared to offer booster shots for all Americans beginning the week of Sept. 20, top health officials announced Wednesday. Starting eight months after a person's second dose, they are eligible for a booster.

"At that time, the individuals who were fully vaccinated earliest in the vaccination rollout, including many health care providers, nursing home residents, and other seniors, will likely be eligible," Rochelle Walensky, director of the CDC; Janet Woodcock, acting FDA commissioner; Dr. Vivek Murthy, surgeon general; Francis Collins, director of the NIH; and Anthony Fauci, director of the NIAID, said in a joint statement.

The data behind the decision is expected to be released at 11 a.m. EST during the White House COVID briefing, but public health officials said it's clear that vaccines are waning over time and "we are starting to see evidence of reduced protection against mild and moderate disease."

With regard to the Johnson & Johnson vaccine, officials stressed that more data will be released in the next few weeks. "We will keep the public informed with a timely plan for J&J booster shots," they said.

-ABC News' Cheyenne Haslett

A mask mandate in El Paso, Texas, which, took effect at 12:01 Wednesday, requires people 2 and older to cover their faces in indoor public spaces. Failure to comply with the new rule is a misdemeanor carrying a fine of $500.

The mandate comes after a judge blocked Republican Gov. Greg Abbott's executive order late Tuesday night, which had forbid masks mandates in the state of Texas. The news comes also within hours of Abbott, who is fully vaccinated, testing positive for COVID-19.

The average number of people being admitted to the hospital each day with COVID-19 in the U.S. has surged by more than 480% since the end of June, marking the highest number of patients seeking care in over six months.

Doctors are warning of the alarming rates of people entering the hospital with life-threatening conditions.

"What was more terrifying this time is that these people are drowning, they're drowning, and it is an awful thing to see,” Dr. Enrique Lopez, surgical tntensivist at Phoebe Health in Georgia said Monday in a new video message.”And you would look up on the monitor and their oxygen saturation would be near perfect and they would just sit there just starving for air just begging to breathe.”

Nationally, more than 83,000 Americans are currently hospitalized with COVID-19 nationwide. Several Southern states are experiencing their worst surge yet, with front line workers raising the alarm about overwhelmed ICUs, and patients waiting in hallways at some hospitals.

"They're just saying over and over again I can't breathe. I can't breathe. I can't breathe, and it was so different than it was last time," said Lopez. "Now, it wants kids, and those ICUs for those pediatric patients are filling up."

Likewise, as cases have increased, so have pediatric hospital admissions, experts say.

"Even though it's uncommon, it can be very severe and even life threatening in some cases," said Dr. Zac Aldewereld, assistant professor of pediatric critical care medicine and pediatric infectious diseases at the University of Pittsburgh. "And yet we have a vaccine to prevent it."

-ABC News' Arielle Mitropoulos