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The odds of a coronavirus vaccine being highly effective are low, Dr. Anthony Fauci said on Friday — and getting people to take it might not be easy, either.

“The chances of it being 98 percent effective is not great,” Fauci, a member of the White House Coronavirus Task Force, said at a Q&A with the Brown University School of Public Health in Rhode Island, according to CNBC.

Instead, Fauci said, scientists are hoping for a vaccine that is 75 percent effective — but even a 50 or 60 percent success rate would be considered a win.

“Which means you must never abandon the public health approach,” explained Fauci, director of the National Institute of Allergy and Infectious Diseases.

Meanwhile, a Gallup poll released on Friday found that more than a third of Americans wouldn’t take a vaccine if it were available today.

Conducted July 20 to Aug. 2, the poll asked 7,632 US adults, “If an FDA-approved vaccine to prevent coronavirus/COVID-19 was available right now at no cost, would you agree to be vaccinated?”

Only 65 percent answered that they would, leaving 35 percent saying they would not.

The poll has a margin of sampling error of 2 percentage points.