Studies from India and south-east Asia have found an increasing trend in sero-prevalence with age, where16% of children aged less than 5 years, 54% of those aged between 5–14 years and 72% of those aged 15–25 years had been infected [ 31 ].
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Studies from India and south-east Asia have found an increasing trend in sero-prevalence with age, where16% of children aged less than 5 years, 54% of those aged between 5–14 years and 72% of those aged 15–25 years had been infected [ 31 ].