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Ratios between the levels immunoglobulin G1 (IgG1), IgG2 and IgG3 subclasses of antibodies reactive with crude malaria antigen or C231 in the different age groups.
| Crude malaria antigen | C231 | |||||
|---|---|---|---|---|---|---|
| Age group (years) | IgG1 : IgG2 | IgG1 : IgG3 | IgG2 : IgG3 | IgG1 : IgG2 | IgG1 : IgG3 | IgG2 : IgG3 |
| 4–9 | 108 | 29 | 0·3 | 3·6 | 0·4 | 0·1 |
| 10–14 | 118 | 12 | 0·1 | 0·5 | 0·5 | 1·1 |
| 15–19 | 54 | 31 | 0·6 | 0·3 | 0·2 | 0·9 |
| 20–87 | 51 | 27 | 0·5 | 3·5 | 3·5 | 1·0 |
