FIG 2.

Proportion of positive cases diagnosed by culture and/or RT-PCR and PT ELISA stratified by time since cough onset in weeks (w). The total number of subjects per time point was used as the denominator. (A) Analysis based on time of symptoms for all reported cases; (B) cases separated by age groups: group 1 (<1 year), group 2 (1 to 6 years), and group 3 (≥7 years).