Causation in the Context of Force Majeure and COVID-19

In most states, the force majeure event must have proximately caused the delay or deficiency in performance. In Tour de Force: When Is COVID-19 the Cause of Nonperformance?, colleagues  Andrew C. Smith, Anne C. Lefever, Brian L. Beckerman, Stephanie S. Gomez, Colin Davis, and Eugenie Dubin discus how causation considerations may impact force majeure claims in the COVID-19 era.