CNN  — 

Universities from California to New York have closed campus classrooms as the novel coronavirus has affected more than 100,000 people worldwide and its spread has transformed into a pandemic.

The cancellations were initially focused in states and areas hardest hit by the virus, including the Seattle area, California and New York.

In some cases, online instruction is being offered for a limited period, or through the semester. Some schools are telling students to not return to campus for 14 days after their return, depending on the laws in their state.

And many universities are issuing guidance on avoiding travel to China, Italy and South Korea, as students are on or about to go on spring break.

These are some of the major institutions that have taken action, including canceling or temporarily suspending in-classroom instruction:

California

California Institute of the Arts

Cal State Long Beach

University of California, Berkeley

University of California, Los Angeles (UCLA)

University of Southern California

Stanford University

Connecticut

Yale University

Delaware

University of Delaware

District of Columbia

American University

Georgetown University

George Washington University

Florida

University of Florida

University of North Florida

University of South Florida

University of West Florida

Florida Polytechnic University

Florida State University

New College of Florida

University of Central Florida

Florida Agricultural and Mechanical University (FAMU)

Florida Atlantic University

Florida Gulf Coast University

Florida International University

Georgia

Emory University

Kennesaw State University

Georgia Southern

Georgia State University

University of Georgia

Illinois

Northwestern University

University of Illinois-Springfield

Indiana

Indiana University

Notre Dame