Lateral-flow rapid diagnostic tests (RDTs) continue to play a vital role in global health in the management and diagnosis of infectious diseases, including malaria, HIV and COVID-19. Visually interpreted RDTs, more than any other class of diagnostics, fulfil WHO’s ASSURED criteria,1 enabling their... use at the lowest levels of health care and in self-testing.2 Their utility is, however, compromised every time a test is incorrectly performed or interpreted or its result is not available in a timely manner for clinical decisionmaking and surveillance.
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Working Document Nov. 2020
The COVAX Supply and Logistics workstream lead by UNICEF, Gavi and WHO have released a working copy of the COVID-19 Vaccination, Country Readiness & Delivery: Supply and Logistics Guidance. Countries might find this Guide useful when developing and strengthening their sup...ply chain strategies to receive, store, distribute and manage the COVID-19 vaccines and their ancillary products, in line with their national deployment and vaccination plan (NDVP). The document also provides links to the different tools and resources to aid countries in performing assessment, planning and capacity-building activities.
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HAT diagnosis relies on laboratory techniques because clinical signs and symptoms are unspecific. Serodiagnostic tests exist only for Tbg and are based on the detection of specific antibodies, thus they are not confirmatory of infection. With the current low disease prevalence, the positive predicti...ve value of serological tests is particularly low. Field-applicable tools include the card agglutination test for trypanosomiasis (CATT) used mainly in active screening by specialized mobile teams, and the rapid diagnostic tests that are more suitable for individual testing at point-of-care. Confirmation of Tbg infection requires microscopic examination of body fluids necessitating specific training. The best performing methods are laborious and reach 85–95% diagnostic sensitivity when performed by skilled personnel.
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HAT diagnosis relies on laboratory techniques because clinical signs and symptoms are unspecific. Serodiagnostic tests exist only for Tbg and are based on the detection of specific antibodies, thus they are not confirmatory of infection. With the current low disease prevalence, the positive predicti...ve value of serological tests is particularly low. Field-applicable tools include the card agglutination test for trypanosomiasis (CATT) used mainly in active screening by specialized mobile teams, and the rapid diagnostic tests that are more suitable for individual testing at point-of-care.
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Despite being a preventable and curable infectious disease, tuberculosis (TB) has continued to elude global controll efforts. In 2023, 8.2 milion people with TB were diagnosed and notified to the WHO, the hightest number ever reported since WHO began tracking.