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Coronavirus cases in the United States are falling again but the virus is not yet under control, Anthony S. Fauci, the nation’s top infectious-disease expert, said Wednesday.

“We had an acceleration. We had a peak. … All three of the parameters — cases, hospitalizations and deaths — are going down. But we have got to do better than that.”

The comments from the White House’s chief medical adviser come amid hope that the summer surge fueled by the highly contagious delta variant of the virus is ebbing. Fauci, who is director of the National Institute of Allergy and Infectious Diseases, said that reaching “the kind of normal that we are all craving” would be possible through a greater vaccination rate.

“We can get to control, without a doubt,” Fauci said. “It is within our power and within our capability.”

Here’s what to know

  • The World Health Organization named more than two dozen scientists to a new multinational advisory team to investigate the origins of the SARS-CoV-2 virus and prepare for any future pandemics.
  • Those who received the Johnson & Johnson vaccine may need a booster shot — and may derive even greater protection if the booster comes from a different vaccine technology.
  • Doctors in the United States are bracing for a “twindemic” of flu and coronavirus spikes. Here’s how to tell the two apart.
  • Congressional Democrats called on the Biden administration to bring new pressure on Moderna and potentially disclose details of the company’s mRNA vaccines, as tensions build over whether the company has sufficiently shared its know-how with the developing world.
  • Foreign tourists with proof of full vaccination against the coronavirus will be allowed to enter the United States via its overland borders with Canada and Mexico as of November, the White House announced late Tuesday.