Some jurisdictions do not extend their interpretation of occupational safety and health law this far, but others do, including the reporting of work-related accidents, incidents and illness. Obviously the boundaries, of what is a reasonably foreseeable risk to employees engaged in work related international travel, can shift as experience grows and as situations change.
The risks to people generally, and specifically your travelling employees, vary from country to country and the situations can change rapidly. Pre-planning, seeking knowledge of the likely conditions to be encountered in each country and providing information and resources on how to deal with them, are the most important actions that can be taken.