Australia Model Code of Practice Managing the Risks of Biological Hazards at Work 4: Identify all reasonably foreseeable biological hazards early, understanding where they are found and how people are exposed, using regular testing of sources (animals, people, cooling tower water, air or surfaces) and expert advice where needed, and prepare for unforeseeable hazards with baseline hygiene and cleaning controls and policies that set responsibilities, processes and the authoritative sources to consult

What does 4 require?

The first step is to identify all reasonably foreseeable biological hazards arising from the work, which requires understanding where they are found and how people are exposed (Chapter 1); identifying sources and exposure routes leads to the risks and the controls needed, and early, proactive identification reduces health risk and builds a safer culture. Most biological hazards are invisible and some replicate and adapt, so regular testing of potential sources may be required (animals, people, cooling tower water, air or surface samples), and expert help from an occupational hygienist, occupational and environmental health physician or biological risk specialist may be needed to find all sources and exposure routes. Some hazards are not reasonably foreseeable, such as a new highly contagious virus arriving from the community; the PCBU should be ready to respond swiftly, with simple baseline controls (good hygiene, routine cleaning) that protect workers when the unforeseen occurs, and policies that set out responsibilities and processes for an unforeseen hazard, including the authoritative sources to consult and who monitors them.