The U.S. suprassed 5 million cases on Sunday, meaning it makes up almost a quarter of the global total.
The White House coronavirus task force member and top immunologist made the comments after President Donald Trump said some states should consider easing restrictions amid the COVID-19 pandemic.
Researchers said the way the body presents data ignores how structural racism produces health inequalities.
Scientists examined the 3D structure of a protein that the virus creates.
Bats have "superpowered" immune systems, Sonja Vernes, of the Max Planck Institute for Psycholinguistics, told Newsweek.
New cases per capita have decreased in Arizona, Delaware, and Maine in the past 14 days.
Scientists said testing saliva and feces samples from passengers could also be explored in future studies.
The U.S. recorded the highest known coronavirus diagnoses, at over 3.6 million of a worldwide total of 14.1 million, according to Johns Hopkins University.
Researchers looked at data on the Chinese city of Wuhan, the original epicentre of the COVID-19 pandemic, for their study.
The study involved almost 500 people in hard-hit Italy.
In the past few weeks, states in the south and west have experienced surges in cases
Being sicker was linked to having more antibodies.
The two countries lead the world for COVID-19 cases and fatalities.
Persistent symptoms included fatigue and trouble breathing.
The research looked at more than 1,200 patients from 69 countries across six continents.
On Thursday, the U.S. hit another record high in reported daily cases at more than 64,000.
The small study involved 11 COVID-19 patients in Germany.
None of the patients who had the condition in the study tested positive for COVID-19.
The remarks could be viewed as a thinly veiled response to the Trump administration's decision to withdraw from the U.N. health agency.
Experts told Newsweek a number of factors play into this seemingly contradictory trend.
Scientists looked at how different face coverings might protect people from a COVID-19 patient.
The state is among those to have been hit by a spike in COVID-19 cases in recent weeks.
Co-author Dr. Peter Kasson of the University of Virginia School of Medicine said: "The key finding is that individual actions matter."
In one month, approximately 300,000 more patients than usual were given hydroxychloroquine in the U.S., according to a study.
Three workers at the mine in China had died after developing pneumonia.
Scientists say variants of the coronavirus named D614 and G614 have differences in the spike protein the bug uses to invade our bodies.
Blood-clotting problems in patients with COVID-19 have been widely reported.