This Delta variant could be the last major push from Covid-19 , but now is not the time for the United States to become complacent because they have not yet taken their course, said an expert. We still have a few months before this Delta wave sweeps through the country in a regionalised way.t we're sort of done with it, said Dr. Scott Gottlieb, former director of the United States Food and Drug Administration. You are starting to see an increase in cases in the colder parts of the country and , as people are being driven inside without masks, you I will start to see cases pick up, he said on Monday. The rate of Covid-19 cases is decreasing nationwide but augLies in these 5 states Nationally, the average daily rate of cases, hospitalizations and deaths from Covid-19 is declining. Over the past week, the average daily number of infections has dropped from over 15,000 to over 86,000, and on average 200 fewer people are dying per day, according to Johns Hopkins University data. Still, an average of around 1,500 people died each day during the last week of Covid-19, according to JHU data. Part of the national improvement can be attributed to southern states emerging from the worst of the wave of variants, Gottlieb told CNN. But not all regions fare equally well. The numbers are rising in the West and Midwest, and it's still unclear how heavy the impact will be in thee Northeast, he said. Gottlieb predicted the worst would be over for much of the country around Thanksgiving and that prevalence levels would decline around Christmas time, but not all health officials are not so certain. I'm not sure we can predict at this time that we are not going to witness a winter surge, CNN medical analyst Dr. Leana told Wen. I really think it 's too early to celebrate and say the worst is behind us. Before any celebration, the United States must keep the trajectory of declining cases, hospitalizations and deaths on track, a feat which depends on vaccinating more people, Dr Anthony Fauci said on Monday. We have about 68 million people in this country who are eligible to be vaccinated and who are not yet vaccinated, of the National Institute of Allergies and Infectious Diseases. Diseases. We need the proverwhelming oportion of those unvaccinated people get vaccinated and we can be sure that if we can do that, you won't see a resurgence. It really depends on us and our ability to seize the opportunity and do vaccinating people said Fauci. Vaccines are key to speeding up the pandemic Vaccines, in addition to other tools like testing, are what will help push through the Covid pandemic -19 in its endemic stage in the United States, Gottlieb said on Monday. When a virus becomes endemic, it presents a risk of persistent infection but does not cause a large number of cases of severe illness and death. The reason we are going through this and the reason that we 'We are going to speed our way through this pandemic to an endemic phase with this virus is because of the vaccine , a- he told CNN's Chris Cuomo. If you look at past outbreaks, they have lasted for more than five years.years. This pandemic has probably won it won't last that long for the West he said. Moderna urges FDA to allow half-size booster dose of its Covid-19 vaccine for some adults Gottlieb said treatments and testing are also important, but vaccines are a key part in the fight against the pandemic. The fact that we can build a wall of immunity through vaccination, and notonly by massively infecting the population, is going to be how we accelerate our way out of the pandemic into an endemic phase with this virus where we can hopefully keep it at bay, Gottlieb said. Pfizer and BioNTech have announced the Last week they were seeking an emergency use authorization for a vaccine for children as young as 5 years old. If approved, the increased accessibility will benefit the health of young children and communities they occupy, experts say. We will really depend on immunizing children, the youngest, in order to increase overall immune protection, Wen said. Hospital staff don personal protective equipment before entering the room of a Covid-19 patient at the ICU at Northwestern Medicine Lake Forest Hospital in Illinois. number of new cases of Covid-19 in children remains exceptionally high according to new data from the target American Academy of Pediatrics (AAP) released on Monday. Children accounted for 24.8% of weekly Covid cases reported last week, when 148,222 cases were reported. More than 750,000 cases of children have been added in the past four weeks, the AAP said. In total, more than six million cases of children in total have been reported since the start of the pandemic, and children represent 16.3% of all cases. Vaccines work, says Fauci As part of increasing Like vaccinations, many health experts are askingwarrants in schools, workplaces and businesses.Fauci told CNN 's Wolf Blitzer, the federal government is trying to persuade people to get vaccinated themselves, but some may have to be forced to . Covid-19 vaccine mandates are working, according to Dr Anthony Fauci We have obviously tried really hard, said Fauci. We are trying to get trusted messengers and trying to prevent this from happening.either an ideological or a political statement, let's go back to the realm of pure public health and try to convince people said Fauci. I mean, we don 't like to tell people what to do with it. to do about vaccines. But we know mandates work. But while many institutions have made the decision to impose vaccines on their students, employees and clients, some state leaders are less inclined. On Monday, Texas Governor Greg Abbott issued an executive order prohibiting any entity from requiring individuals to be vaccinated. The COVID-19 vaccine is safe, effective and our best defense against the virus, but must remain voluntary and never forced, said Abbott. CNN's Virginia Langmaid, Jamie Gumbrecht, Maggie Fox and Jennifer Selva contributed to this report.