The Wall Street Journal reported the Organization for Economic Cooperation and Development predicted a slowing world economy as a result of the unchecked coronavirus.

The Journal added that the organization’s “best case” now predicts the global economy will grow by 2.4%, a weaker performance than the 2.9% expansion projected before the viral outbreak. That lost growth is roughly equivalent to $400 billion.

According to the Journal, the OECD said much more severe slowdowns are possible.