ASSESSMENT OF THE MALARIAL SURVEILLANCE AND RESPONSE MODEL IN VIETNAM PERIOD 2017-2021

Tóm tắt

To enhance malaria elimination, Vietnam adopted a Reactive Surveillance and
Response (RASR) Strategy in which malaria case notification and investigation must be
completed within 2 days followed by a foci investigation within 7 days. The nationwide
performance of Vietnam’s RASR strategy has yet to be evaluated. This study aims to
evaluate the performance and feasibility of RASR in Vietnam, thereby providing
recommendations for improved RASR. Secondary data analysis of nationwide malaria
case-based dataset from 2017 to 2021; In Vietnam, there are guidelines and procedures
for implementation of each step of RASR. Analysis of a total of 12,965 case reports stored
in the database for this period, the completeness of case notification on the reported
monthly aggregated data was very high in both the paper-based (12.463/12.498, 99.7% in
2017-2020) and electronic reporting systems (467/467, 100% in 2021 when electronic
reporting was introduced); however, there were delays in notification while using the
paper-based system (timely notification – 7.978/12.498, 63.8%). In 2021, the
completeness (453/467, 97.0%) and timeliness (371/467, 79.4%) of case investigation
were found to be high. Reactive case detection was the major foci investigation response,
with fever screening achievement of 88.6% (11.481 / 12.965) and 88.5% (11.471 / 12.965)
among index case and neighboring household members respectively. Overall, there was
policy commitment for implementation of RASR in Vietnam. The completeness and
timeliness of case notification and case investigation were high and improved after the
introduction of the electronic reporting system. More evidence is required for reactive
case detection in defining the screening area or population.