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.
EBV (Epstein-Barr Virus or human herpes virus type 4) is a herpes virus which infects 50% of children before the age of five, and causes infectious mononucleosis in young adults.