'Contagion' stars including Matt Damon, Kate Winslet film PSAs to offer COVID-19 advice

Winslet, who played an epidemiologist trying to contain the spread of the hypothetical virus, recalled the time she spent with some public health experts to prepare for her role, and shared one of the most important things she learned from the professionals.

"Wash your hands like your life depends on it," Winslet said in her PSA spot as she washed her hands, showing people a demonstration of how to do it properly.

"Because right now, in particular, it just might," said the celebrated British actress, adding that, "The health of our society is quite literally in your hands."

In Ehle's video, she stressed that the coronavirus is new, meaning that no-one is immune. "Every single one of us, regardless of age or ethnicity, is at risk of getting it," she said.

Additionally, Fishburne appealed to helping medical staff dealing with the coronavirus and flattening the curve together.

"If we can slow this thing down, it will give our doctors and our nurses in our hospitals a fighting chance to help us all get through this thing together," the actor added.