Safety Norms: Infectious Disease and Immunology

1Purpose, Scope, and Safety Principles

These norms set minimum expectations for anyone who studies, handles, or supports work involving infectious agents, human or animal specimens, immunological reagents, and vaccine-related activities. Their purpose is to prevent exposure to biological agents, protect people and the environment, and keep work traceable and lawful.

Three principles guide every rule. First, treat any specimen, culture, or patient material as potentially infectious until a qualified person has confirmed otherwise. Second, control the hazard at its source before relying on personal protection. Third, stop work and escalate whenever a task falls outside your training or approved procedure. This document is educational guidance and does not replace professional authorization or approved local procedures.

• Mandatory: no one begins work with infectious material without documented authorization.
• Recommended: read this document alongside local biosafety, infection prevention, and laboratory procedures.

2Roles, Competence, and Accountability

The institution or employer must appoint a responsible biosafety or infection prevention lead, a supervisor for each laboratory, clinic area, or teaching space, and a named person who manages incident reporting. Where these roles are not filled, the most senior accountable person must assign them in writing. Accountability does not transfer when work is delegated.

Competence is established before independent work. Staff must complete role-specific training, demonstrate skills under observation, and receive written authorization for each agent risk level, procedure, or clinical task. Students work only under direct supervision unless local rules permit otherwise.

• Mandatory: personnel without current authorization do not handle cultures, unfixed specimens, or patient samples.
• Mandatory: vaccines and immunizations are administered only by persons legally authorized to do so within their local scope of practice.
• Recommended: use a buddy system for high-consequence procedures and for after-hours work.

3Course-Specific Hazards and Risk Assessment

Typical hazards in this subject include bacteria, viruses, fungi, parasites, and prions. Exposure routes include aerosols, splashes, needlestick injuries, contaminated surfaces, and accidental ingestion. Immunology work adds chemical hazards from fixatives, detergents, and solvents, biological hazards from human blood, serum, and cell lines of uncertain status, and physical hazards from centrifuges, sharps, liquid nitrogen, and autoclaves.

Risk is the combination of how likely an exposure is and how severe the outcome could be. Each agent, specimen type, and procedure should be assigned a risk level in a written assessment. The supervisor completes the assessment with input from the biosafety lead and the person doing the work. Reassess whenever the procedure, agent, or equipment changes, and before any new activity starts.

• Aerosol-generating steps, such as vortexing, sonication, forceful pipetting, opening centrifuge rotors outside a sealed system, and homogenizing tissue, are high risk and require a biological safety cabinet or equivalent containment.
• Mandatory: needles and sharps are never recapped by hand, bent, or passed from person to person. They go directly into a puncture-resistant container at the point of use.
• Mandatory: specimens from patients are handled as potentially infectious regardless of any reported diagnosis.
• Mandatory: work with agents above the risk group approved for the facility is prohibited unless specifically approved under applicable regulatory and institutional processes.
• Mandatory: cell lines, primary cells, and donor materials must have documented source and screening status before use.
• Mandatory: high-risk tasks require a second competent person to review controls before work begins.

4Preventive Controls and Safe Work Practices

Apply the hierarchy of controls in order. Eliminate the hazard where possible. Substitute less hazardous agents or methods. Use engineering controls such as biological safety cabinets, sealed centrifuge rotors, and closed transfer systems. Use administrative controls such as written procedures, restricted access, and supervised training. Use personal protective equipment as the last line of defense, not the first.

Standard practices apply to every specimen and culture. Disinfect work surfaces before and after each session with an approved agent, left in contact for the time stated by its manufacturer. Wash hands after removing gloves and before leaving the work area. Food, drink, cosmetics, and contact lenses are prohibited in any area where biological materials are handled.

• Mandatory: wear gloves, a fastened laboratory coat or gown, and eye protection for all work with biological materials. Change gloves when torn, contaminated, or before leaving the work area.
• Mandatory: perform all open manipulation of infectious material inside a certified biological safety cabinet, with the sash at the approved height and the cabinet not overloaded.
• Mandatory: decontaminate tips, tubes, plates, and sharps before disposal, and place them in the approved waste stream. Untreated infectious waste never goes into general trash.
• Mandatory: label every tube, plate, and reagent aliquot with contents, hazard status, and preparer identification under local labeling rules.
• Mandatory: transport specimens in leakproof primary containers inside labeled secondary containers, following the applicable rules for infectious substances, which vary by jurisdiction and carrier.
• Mandatory: do not use human specimens for immunological testing until consent, de-identification, and approval requirements under local rules are confirmed.
• Mandatory: store vaccines within the temperature range stated by the manufacturer, record temperatures at the interval set by local policy, and quarantine doses if the cold chain is broken, following the local protocol.
• Recommended: choose closed or safety-engineered devices where they can perform the same task, and prefer single-use or pre-measured reagents for high-risk steps.
• Recommended: keep antibody stocks, cytokines, and fixatives in labeled, closed containers, and review the safety data sheet before first use.

5Equipment, Environment, Information, and Protective Safeguards

Equipment must be inspected, maintained, and certified on the schedule set by the manufacturer and local authority. Cabinets, centrifuges, autoclaves, freezers, and flow cytometers each have specific failure modes that users must recognize. Autoclave cycles are verified with biological or chemical indicators according to local procedure. Out-of-service equipment is tagged and removed from use until a qualified technician clears it.

Environmental controls include directional airflow, restricted access to containment areas, appropriate waste containment, and scheduled cleaning. Information controls protect patient privacy and research integrity. Clinical and research data are shared only on a need-to-know basis, stored in approved systems, and never kept on personal devices or posted on social media.

• Mandatory: maintain a current inventory of infectious agents, toxins, and controlled reagents, showing storage location and responsible person.
• Mandatory: restrict access to freezers and cold rooms holding biological materials, and log each entry that changes stored items.
• Mandatory: protect patient identifiers and results under applicable privacy laws. Report any suspected unauthorized disclosure immediately.
• Mandatory: respirators or additional respiratory protection are used only after training and fit testing required by the local program. Surgical masks and cloth face coverings are not respirators.
• Recommended: keep a signed log for cabinet and autoclave use, recording run details and any failure notes.
• Recommended: use dedicated sharps and biohazard containers with lids closed when not in use, placed within arm's reach and never filled above the marked line.
• Recommended: keep an eyewash station and safety shower within the travel distance set by local guidance, and test them on a scheduled basis.

6Incident Reporting, Emergency Response, and Escalation

Every injury, exposure, spill, near miss, lost specimen, or suspected laboratory-acquired or clinical infection must be reported immediately to the supervisor and the designated occupational health or infection prevention contact. Reporting is required and is not a disciplinary admission. Prompt reporting allows timely medical assessment and corrective action.

For a percutaneous injury or mucous membrane exposure, the first step is local first aid. Wash the area with soap and water, or flush the eyes with water or saline, following local first aid guidance. Then seek prompt medical evaluation through the designated service. Do not delay care to complete paperwork. Decisions about post-exposure prophylaxis must be made by qualified clinicians under local protocols.

• Mandatory: in a spill of infectious material, alert others, restrict access, and apply protection only if trained and the spill kit is available. Cover the spill with absorbent material, apply the approved disinfectant for the required contact time, and document the response.
• Mandatory: for fire, sprinkler activation, power failure, or gas leak, follow the building emergency plan, evacuate, and call emergency services. Do not reenter until cleared.
• Mandatory: a supervisor who learns of a reportable incident notifies the biosafety lead within the time limit set by local policy.
• Mandatory: a suspected release of a highly hazardous agent is escalated to the appropriate public health or regulatory authority without delay, as required by local law.
• Recommended: post emergency contacts, the building plan, and the nearest medical service at each work area.

7Records, Training, Inspection, and Review

Records show that controls were in place and support traceability. Keep training records, authorizations, risk assessments, equipment logs, temperature records, inventories, incident reports, and corrective actions for the retention period set by local law and institutional policy. Records must be legible, complete, and protected from unauthorized alteration.

Training is refreshed when procedures change, after an incident, and at the interval required by local policy. Supervisors and safety staff inspect practice against the written norms. Each finding is assigned to a named owner with a defined action. The norms are reviewed on the local review cycle and after any significant incident, new agent, equipment change, or regulatory update.

• Mandatory: maintain the authorization list and remove access promptly for anyone who changes role or leaves the program.
• Recommended: run a short drill on spill response and exposure reporting at the frequency set by local policy.
• Recommended: review near-miss reports for trends, such as repeated glove tears or cabinet alarms, and change the procedure rather than relying only on retraining.

Implementation checklist

• Confirm written authorization before handling any infectious or patient-derived material.
• Perform all open manipulations inside a certified biological safety cabinet.
• Wear required gloves, gown, and eye protection, and change gloves when damaged.
• Never recap, bend, or hand-pass needles; use a sharps container at the point of use.
• Decontaminate waste and surfaces with approved agents for the stated contact time.
• Store and transport vaccines and specimens at required temperatures in labeled, leakproof containers.
• Report every exposure, spill, or near miss immediately and seek medical evaluation without delay.
• Protect patient identifiers and keep results on approved systems only.
• Check that spill kits, eyewash stations, and emergency contacts are available and current.
• Verify jurisdiction-specific laws, standards, and manufacturer instructions with competent authorities or qualified professionals.