49% of U.S. adults said in a recent Pew survey they would not get a coronavirus vaccine if one were available today.

Why it matters: All major political and demographic groups said they are less likely to get a vaccine now than they were in May, although Republicans and Black adults are the least likely.

Worries about side effects and uncertainty as to how effective a vaccine would be were commonly cited in the survey as reasons for wanting to avoid a vaccine if one were available.

By the numbers: More than 197,000 people have died from COVID-19 in the U.S. Over 2.5 million have recovered and over 91 million have been tested for the virus. The U.S. has reported more than 6.6 million positive cases, according to Johns Hopkins University data.

What's happening: Coronavirus infections ticked up slightly over the past week, thanks to scattered outbreaks in every region of the country. The U.S. saw an average of about 37,000 new cases per day over the past week.

New York City pushed back its scheduled start of in-person learning for middle and high school students to October, Mayor Bill de Blasio announced Thursday, CNBC reports.

A paper published Thursday in the medical journal Health Affairs estimates that at least 42% of America's school workers are at a high risk of developing severe cases of COVID-19, per the New York Times.

A forecast published Thursday by the Centers for Disease Control and Prevention projects there will be 207,000 to 218,000 coronavirus deaths in the U.S. by Oct. 10, CNN reports.

Trump claimed at a press briefing this week that CDC director Robert Redfield was wrong when he testified to Congress that a coronavirus vaccine won't be available for widespread distribution until the second or third quarter of 2021.

White House press secretary Kayleigh McEnany told reporters Wednesday that "herd immunity has never been a strategy" for the Trump administration, after the president claimed Tuesday that the coronavirus would disappear when people develop "a herd mentality."

Trends to watch:

Go deeper ... In photos: Life in the era of the coronavirus pandemic

Editor's note: The graphic includes "probable deaths" that New York City began reporting on April 14. This article has been updated with new details throughout. Check back for the latest.