KEY POINTS
  • The coronavirus remains a highly dynamic situation, and investors need to approach it with extreme caution, CNBC's Jim Cramer said.
  • "It is a deck of wild cards. Why don't we get some real cards on the table, and then we can make better decisions," the "Mad Money" host said.
  • "There are lots of very smart people in this business, but very few of them are infectious disease experts," he added.

The coronavirus outbreak remains a highly dynamic situation, and investors need to approach it with extreme caution, CNBC's Jim Cramer said Friday.

"You need to be prepared and remember my wild card thesis," the "Mad Money" host said. "We don't know what's going to happen with this virus."