On May 5, 2014, it was announced John Krasinski would direct the film, with Krasinski, Anna Kendrick, Margo Martindale and Richard Jenkins joining the cast.
Epstein-Barr virus (EBV) is a ubiquitous herpesvirus spread by human contact with no know environmental reservoir. Antibodies are detected in 90 to 95% of adults worldwide. EBV infection is subclinical in 90% of children.
The Epstein-Barr virus, also called EBV, is an extremely common virus that infects most people at one time or another during their lifetimes. Epstein-Barr virus infection generally causes a minor cold-like or flu-like illness, but, in some cases, there may be no symptoms of infection.