A woman was injured by a bison at Yellowstone on Wednesday — just two days after the national park reopened to tourists amid the coronavirus pandemic.

The bison knocked the visitor to the ground in the Upper Geyser Basin near Old Faithful, after she approached the large mammal too closely, park officials said in a statement.

She was checked out by first responders at the scene and refused transport to a medical facility. The incident is under investigation.

It was the first bison attack at the park this year.

The nearly 3,500-square-mile wilderness recreation area reopened the east and south entrances on Monday, after being closed for seven weeks because of the outbreak.

Visitors are required to stay 25 yards away from bison and other large animals, including elk, deer and coyotes, and at least 100 yards away from bears and wolves.