What PPE is recommended for handling a patient with a suspected unknown biological agent?

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Unknown biological agents can present a risk of both aerosol and contact transmission, so protection must cover both pathways. The best approach is to apply standard precautions plus enhancements for contact and airborne spread. This includes using a respirator that is NIOSH-approved (such as an N95 or a powered air-purifying respirator) to filter airborne particles, along with gloves, a gown, and eye protection to guard mucous membranes and skin from contamination. Relying on gloves alone or skipping respiratory protection leaves key routes of exposure unaddressed. A full positive-pressure suit is reserved for situations with exceptionally high risk or specific procedures, not routine unknown-agent encounters. The combination of standard precautions with airborne and contact protections provides comprehensive coverage against potential transmission while maintaining essential infection-control practices.