Articles
Evidence for health where it's hardest to deliver.. Explore our collection of expert insights, guides, and the latest updates.
In this issue
- Operational Research
The 30×7 Cluster Survey: How Operational Research Measures Vaccination Coverage With 210 Children
How a two-stage, 210-child sample became the field standard for estimating vaccination coverage, and why WHO revised it in 2018.
IHJ Editorial Board16 August 20265 min read - Malaria & Vector-Borne Disease
RTS,S or R21: How the Two WHO-Recommended Malaria Vaccines Compare
RTS,S and R21/Matrix-M are both WHO-recommended. Here is how their efficacy, dosing, and rollout actually differ for vector-borne disease control.
IHJ Editorial Board16 August 20265 min read - Outbreak Field Kits & Procurement
Pre-Positioned or Air-Freighted? How Global Health Teams Decide Where an Outbreak Kit Waits
Why some outbreak kits sit in regional warehouses and others fly in only after a case is confirmed, and how field programs weigh the difference.
IHJ Editorial Board16 August 20265 min read - Trauma & Hemorrhage Control
How to Pack a Wound to Stop Bleeding: The Technique Behind Direct Pressure
Wound packing controls bleeding a tourniquet can’t reach. The technique, the materials, and why the first minutes of pressure decide the outcome.
IHJ Editorial Board16 August 20265 min read - Medical-Grade Water Filtration
Dialysis Water Purity: Why Hemodialysis Sets a Higher Bar Than Drinking-Water Standards
Hemodialysis water is held to a far stricter purity standard than drinking water. Here is why, and what the numbers actually require.
IHJ Editorial Board16 August 20265 min read - PPE for High-Consequence Pathogens
Respirator Fit Testing for High-Consequence PPE: What OSHA 1910.134 Actually Requires
Why a PAPR can skip the fit test an N95 or elastomeric respirator can’t — and what OSHA 29 CFR 1910.134 requires either way.
IHJ Editorial Board16 August 20265 min read - Vaccine Cold Chain Explained
The Shake Test: How Field Teams Detect a Freeze-Damaged Vaccine
A low-tech field test separates freeze-damaged vaccine from safe stock — and explains why heat monitoring alone cannot catch it.
IHJ Editorial Board16 August 20265 min read - Disease Modelling & Data
Overdispersion and the K Parameter: Why Superspreading Beats the R0 Average
R0 gives a single average. The dispersion parameter k explains why a handful of cases, not the typical case, often drive an outbreak.
IHJ Editorial Board16 August 20265 min read - Vaccination Campaign Logistics
AEFI Surveillance: The Vaccination Campaign Logistics Track Cold Chain Doesn’t Cover
AEFI surveillance runs alongside vaccine supply and cold chain as its own workstream, with separate forms, staff, and reporting lines.
IHJ Editorial Board16 August 20265 min read - Rapid Diagnostic Tests (RDTs)
How to Read a Combo Dengue Rapid Test: NS1, IgM, and IgG Explained
A field guide to interpreting the three lines on a combo dengue rapid test, and why the pattern you see depends entirely on when you test.
IHJ Editorial Board16 August 20265 min read - Field Epidemiology Methods
Case-Control or Cohort? How Outbreak Investigators Choose a Study Design
The analytic study choice in an outbreak investigation isn’t arbitrary — it follows from whether the exposed population can be defined.
IHJ Editorial Board16 August 20265 min read - PPE for High-Consequence Pathogens
Ebola PPE Wear-Time Limits: Why Heat Stress Drives Staffing, Not Just Stock
Ebola-grade PPE traps heat as it blocks the virus, capping safe wear time and reshaping how field teams staff an isolation ward.
IHJ Editorial Board16 August 20265 min read