Seroprevalence of Bordetella pertussis specific Immunoglobulin G antibody levels among asymptomatic individuals aged 4 to 24 years: a descriptive cross sectional study from Sri Lanka.

BMC Infect Dis · 2016 · PMC5133742 · PMID 27905894

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an increasing trendno p-value reported

It was followed by 23 cases in 2011 and 61 cases in 2012 showing an increasing trend [ 20 ].

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