coverage of DTP3 in < 1 year old (%)

Indicators used for estimating the vaccine coverage of the total EPI strategy. To avoid overestimation, measles vaccination coverage is often used as a proxy since it is usually lower than DTP3 coverage.

Numerator

Number of infants (under 12 months of age) who received DTP3 in a given year

Denominator

Estimated number of infants (under 12 months of age) in the same year

Disaggregation

Administrative area; health area; sex

Indicator used for response monitoring ?

Yes

Types

Baseline

Output

Threshold / Standard

>95% Follow-up of trends

General guidance

Calculation: DTP3 coverage refers to the percentage of one-year-olds who have received three doses of the combined diphtheria, tetanus toxoid and pertussis vaccine in a given year; Limitations: The coverage estimates calculated using the administrative method can be biased due to inaccurate numerators or denominators. Numerators may be underestimated (due to incomplete reporting from reporting units or non-inclusion of other vaccinating sources (e.g. private sector, non-governmental organizations), or overestimated (due to over-reporting from reporting units e.g. inclusion of other target groups) Denominator inaccuracies may be due to issues such as: population movement, inaccurate census estimations or projections and/or numerous sources of denominator data Alternatively, vaccination coverage can be estimated by household surveys, where the numerator will be the number of children in a given age range vaccinated and the denominator will be the total number of children in the same age range in the survey.

Guidance on phases

There is a differing level of quality of data which can be collected at different phases of the emergency depending on the context, eg the data available and the systems for data collection in place before the crisis, the accessibility of the affected areas, the resources on the ground, etc... Periodical household vaccination coverage surveys should be considered, particularly following a campaign. Households surveys will be more doable in later phases of the emergency.

Phase applicability

Pre-crisis/Baseline

Phase 1

Phase 2

Phase 3

Phase 4

Data Sources

Numerator: routine health facility reporting system Denominator: administrative boundaries; health areas boundaries; population per administrative area; population per health areas; Alternatively numerator and denominator can be recorded through household surveys

Comments

Further guidance: Immunisation coverage (http://www.who.int/healthinfo/systems/WHO_MBHSS_2010_full_web.pdf)