Fig. 3
Monthly variation of log 10-transformed diphtheria, tetanus and pertussis antibody titres in infants measured at 12 (A1,3,5; B1,3,5) and 24 (A2,4,6; B2,4,6)Â weeks of age. The blue shading highlights the rainy/hungry season in The Gambia which lasts from June to October. The dry season runs from November to May (no shading)