| Acute optic neuritis |
| Acute rheumatic fever |
| Adrenoleukodystrophy |
| Amegakaryocytic thrombocytopenia |
| Antiphospholipid syndrome (non-obstetric) |
| Aplastic anaemia/pancytopenia |
| Asthma |
| Atopic dermatitis/eczema — adult |
| Autism |
| Autologous haemopoietic stem cell transplantation |
| Behçet’s disease |
| Cardiac surgery with bypass — prophylaxis |
| Congestive cardiac failure |
| Crohn’s disease |
| Diamond Blackfan syndrome |
| Female infertility |
| Glomerulonephritis — IgA nephritis |
| Haemolytic uraemic syndrome |
| Henoch–Schonlein purpura |
| HIV/AIDS — adult |
| Idiopathic dilated cardiomyopathy |
| Linear IgA disease |
| Lupus cerebritis |
| Lupus nephritis |
| Motor neuron disease/amyotrophic lateral sclerosis |
| Myalgic encephalomyelitis |
| Narcolepsy/cataplexy |
| Nephrotic syndrome |
| Obsessive compulsive disorders |
| Polyneuropathy of critical illness |
| Recurrent foetal loss (with or without antiphospholipid syndrome) |
| Rheumatoid arthritis |
| Sepsis |
| Sickle cell disease |
| Systemic lupus erythematosus |
| Ulcerative colitis |