It is unlikely that museums will identify biohazards in their collections, but some museums may need to review parts of their collections. Common-sense precautions will avoid acquiring contemporary objects contaminated with infected material, e.g. by verifying objects are sterilized before acquisition.
Of greater likelihood is finding objects stored in unsatisfactory conditions contaminated with biological agents present in guano and droppings. Accordingly, a museum must carry out a COSHH risk assessment. Where a biohazard cannot be eliminated, the employer must provide employees and others likely to be exposed with the means to avoid or reduce risks of harmful exposure.