<prompt> True about SCID in children is:It is due to adenosine deaminase deficiencyHumoral immunity is predominantly affectedChild should receive double dose of all vaccinesPatients with SCID have normal thymus  <response>: SCID: It is due to adenosine deaminase deficiency SCID- combined antibody and cellular defect Live vaccines are contraindicated in SCID Patients with SCID have very small thymus; tonsils adenoids are also absent or underdeveloped 