Improvised PPE for Biological Threats

Ideal protection against biological agents involves full PPE: N95 or better respirators, face shields, gowns, and gloves. In a biological emergency where professional PPE is exhausted or inaccessible, improvised protection can reduce — but not eliminate — exposure risk. Understanding what improvised PPE achieves and how to use it correctly allows you to make meaningful protection decisions with available materials.

The Honest Assessment

Improvised PPE provides partial, not full, protection. Its value is real but limited:

Protection Item	Professional	Improvised Equivalent	Effectiveness
Respiratory	N95/FFP2 respirator	Multi-layer cloth mask	Reduced — some large particle filtration
Eye	Goggles / face shield	Glasses + improvised shield	Partial — reduces droplet splash
Skin	Surgical/isolation gown	Tightly woven long-sleeved clothing	Partial — reduces surface contact
Hands	Nitrile gloves	Rubber household gloves	Good — if unbroken
Footwear	Boot covers	Plastic bag shoe covers, wellies	Partial

The lowest-cost, highest-value protection remains thorough handwashing and avoiding face-touching — no equipment required.

Respiratory Protection

Cloth Masks

Multiple-layer cloth masks reduce inhalation of large respiratory droplets. They do not filter aerosol particles down to pathogen size.

Making a more effective cloth mask:

1. Use at least three layers — outer layer (tightly woven; water-resistant if possible), middle layer (filtration material), inner layer (comfort; absorbent).
2. Middle layer materials that improve filtration: vacuum cleaner bag material (HEPA-grade), coffee filter paper, non-woven fabric from reusable shopping bags.
3. Fit matters as much as material — gaps at the nose and sides allow unfiltered air to bypass the mask. Press a flexible nose wire (twist tie, thin wire) over the nose bridge and shape it to your face.
4. Change the mask when it becomes damp — moisture reduces filtration efficiency and may harbour organisms.

What a cloth mask does NOT protect against:

• Airborne pathogens at concentrations equivalent to being in direct contact with a sick person
• Deliberate high-concentration aerosol release
• Extended exposure in a contaminated environment

Wrapping a Scarf or Cloth

For short-duration movement through a potentially contaminated area:

1. Fold a clean dry cloth or scarf into multiple layers.
2. Hold tightly over the nose and mouth, pressing against the face.
3. Breathe slowly and deliberately through it.
4. This is a last resort — use it while moving to safety; replace with proper PPE as soon as possible.

Eye Protection

Biological agents can enter through the eyes (splash, droplet, or touching with contaminated hands):

• Goggles that seal to the face are best
• Safety glasses provide partial protection from splashes
• Improvised eye protection: a clear plastic sheet (sandwich bag, document protector) shaped over the eyes and secured with elastic; this is crude but better than nothing in a droplet spray environment

Skin Protection

Gown substitution:

• Long-sleeved clothing that covers the arms and torso
• Tightly woven fabric is more resistant to droplet penetration
• A rain jacket or waterproof layer is effective at repelling liquid droplets

Important: Clothing worn in a contaminated area must be removed using the contaminated clothing removal technique — rolling outward — when you exit. Do not bring it into clean spaces.

Hand Protection

Gloves are the most important improvised PPE item because hand-to-face contamination is the primary route for many pathogens:

1. Household rubber gloves — effective barrier if intact.
2. Doubled disposable gloves — if single gloves are all that is available, doubling provides backup if one layer fails.
3. Improvised gloves — plastic bags secured at the wrist are an extremely poor substitute but better than bare hands in a brief, controlled task.

Donning and doffing:

• Put gloves on last (after all other PPE).
• Remove gloves first when doffing — peel from the wrist, turning the glove inside out.
• Never touch your face or clean skin with gloved hands.
• Wash hands thoroughly after removing gloves.

The Sequence: Putting PPE On and Taking It Off

Donning (Putting On) — Clean to Contaminated

1. Hand hygiene (wash hands)
2. Gown or outer clothing protection
3. Mask / respirator
4. Eye protection
5. Gloves (last)

Doffing (Taking Off) — Contaminated to Clean

The most dangerous moment is removing PPE — contaminated surfaces touch clean hands.

1. Gloves (peel off, turning inside out)
2. Hand hygiene
3. Eye protection (remove from behind; do not touch front surface)
4. Gown or outer clothing (roll inward as you remove)
5. Mask (remove by ties or ear loops from behind; do not touch the front)
6. Hand hygiene (final)

⚠️ Incorrect doffing is a leading cause of PPE failure. Taking PPE off correctly is as important as putting it on correctly.

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Quick Reference

Body Part	Best Improvised Option	Key Point
Respiratory	3-layer cloth mask with filter layer	Fit matters; change when damp
Eyes	Goggles or safety glasses	Anything sealing reduces droplet splash
Skin	Long-sleeved tightly woven clothing + waterproof outer layer	Remove using contaminated clothing technique
Hands	Rubber household gloves	Last on; first off; never touch face
Doffing sequence	Gloves → hand hygiene → eye protection → gown → mask → hand hygiene	Do not rush this step