Total 33 clinical symptoms reported for MHC class II deficiency  Very Frequent (2)Uncommon (3)Occasional (10)Frequent (17)Always (1)

Recurrent infection of the gastrointestinal tract	Recurrent infection of the gastrointestinal tract.   Synonyms:Recurrent gastrointestinal infections; Recurrent infection of the gastrointestinal tract; Recurrent infection of the GI tract	Very frequent
Recurrent respiratory infections	An increased susceptibility to respiratory infections as manifested by a history of recurrent respiratory infections.   Synonyms:Frequent respiratory infections; Multiple respiratory infections; Recurrent respiratory infections; respiratory infections, recurrent; Susceptibility to respiratory infections	Very frequent