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CHAPTER 6

Toward Formal Public Health Evaluation

Moving results built up mainly in engineering onto the formal evaluation agenda of public health: this is the 2026 proposal.

Reframing Pandemic Preparedness: Why Positive-Pressure Exposure Control Merits Formal Public Health Evaluation
Y. Fujii — JMIR Public Health and Surveillance, Vol.12, e90211, 2026.
https://doi.org/10.2196/90211

Role: Proposal for formal evaluation as public health policy (overview)

A Viewpoint proposing that positive-pressure PAPR exposure control for the general public be named, in WHO and national pandemic preparedness plans, as a candidate intervention requiring evidence of effectiveness, and that stepwise evaluation begin in non-emergency times. Published 27 August 2026.

PDF: https://publichealth.jmir.org/2026/1/e90211/PDF

Main arguments

  1. APF 1000 as a reference point. Under specified fit and operating conditions, positive-pressure PAPRs may reduce inhaled aerosol concentration to about 1/1000 of ambient.
  2. Determine required performance empirically. Rather than fixing APF 1000 for everyone, the necessary and sufficient level should be set from the pathogen, exposure time, wearing rate and adherence, to meet individual and population targets.
  3. Field studies in peacetime. Performance, safety, infection prevention and acceptability should be evaluated before a crisis, for example during seasonal influenza.
  4. After a crisis begins is too late. Standardised public-use models, manufacturing capacity, parts and consumables, and procurement, stockpiling and distribution should be considered in non-emergency times.

What should be evaluated

AreaItems
Engineering performanceAerosol shielding, maintaining positive pressure, CO₂ removal, stability
Infection preventionIndividual protection; population-level infection control
People and societySafety, sustained use, social acceptability
ImplementationFeasibility, cost, equity
PrivacyNetworked monitoring of use evaluated separately for privacy impact (Chapter 7)

Open questions are a reason to start evaluation, not to exclude

Real-world infection prevention, safety of long-term wear, sustained use, and cost and equity of access have not yet been demonstrated. The paper proposes that these open questions be treated not as reasons to drop the candidate, but as reasons to begin formal evaluation.

The question is this: do we look for new measures after the next pandemic begins, or do we evaluate concrete, testable candidate interventions now, in peacetime?

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Contents

Measures for the Next Pandemic: engineering and social infrastructure for controlling infection without stopping society | Yusaku Fujii (Gunma University)
This site presents research-stage work; figures are model calculations or prototype measurements.