The first List of Essential Diagnostics was published in 2018, concentrating on a limited number of priority diseases – HIV, malaria, tuberculosis, and hepatitis. This year’s list has expanded to include more noncommunicable and communicable diseases.
Cancers: Given how critical it is to secure an early cancer diagnosis (70% of cancer deaths occur in low- and middle-income countries largely because most patients are diagnosed too late), WHO added 12 tests to the Diagnostics List to detect a wide range of solid tumours such as colorectal, liver, cervical, prostate, breast and germ cell cancers, as well as leukemia and lymphomas. To support appropriate cancer diagnosis, a new section covering anatomical pathology testing was added; this service must be made available in specialized laboratories.
Infectious diseases: The list focuses on additional infectious diseases prevalent in low- and middle-income countries such as cholera, and neglected diseases like leishmaniasis, schistosomiasis, dengue, and zika.
In addition, a new section for influenza testing was added for community health settings where no laboratories are available.
General tests: The list was also expanded to include additional general tests which address a range of different diseases and conditions, such as iron tests (for anemia), and tests to diagnose thyroid malfunction and sickle cell (an inherited form of anemia very widely present in Sub-Saharan Africa).
Another notable update is a new section specific to tests intended for screening of blood donations. This is part of a WHO-wide strategy to make blood transfusions safer.
See full press release here: https://www.who.int/news-room/detail/09-07-2019-who-updates-global-guidance-o...
The list is available here: https://www.who.int/medical_devices/publications/Second_WHO_Model_List_of_Ess...