Biosecurity refers to measures aimed at preventing the introduction and/or spread of harmful organisms (e.g. viruses, bacteria, etc.) to animals and plants in order to minimize the risk of transmission of infectious disease. In agriculture, these measures are aimed at protecting food crops and livestock from pests, invasive species, and other organisms not conducive to the welfare of the human population. The term includes biological threats to people, including those from pandemic diseases and bioterrorism. The definition has sometimes been broadened to embrace other concepts, and it is used for different purposes in different contexts. The COVID-19 pandemic is a recent example of a threat for which biosecurity measures have been needed in all countries of the world. Background and terminology The term "biosecurity" has been defined differently by various disciplines. The term was first used by the agricultural and environmental communities to describe preventative measures against threats from naturally occurring diseases and pests, later expanded to introduced species. Australia and New Zealand, among other countries, had incorporated this definition within their legislation by 2010. New Zealand was the earliest adopter of a comprehensive approach with its Biosecurity Act 1993. In 2001, the US National Association of State Departments of Agriculture (NASDA) defined biosecurity as "the sum of risk management practices in defense against biological threats", and its main goal as "protect[ing] against the risk posed by disease and organisms". In 2010, the World Health Organization (WHO) provided an information note describing biosecurity as a strategic and integrated approach to analysing and managing relevant risks to human, animal and plant life and health and associated risks for the environment. In another document, it describes the aim of biosecurity being "to enhance the ability to protect human health, agricultural production systems, and the people and industries that depend on them", with the overarching goal being "to prevent, control and/or manage risks to life and health as appropriate to the particular biosecurity sector". Measures taken to counter biosecurity risks typically include compulsory terms of quarantine, and are put in place to minimise the risk of invasive pests or diseases arriving at a specific location that could damage crops and livestock as well as the wider environment. In general, the term is today taken to include managing biological threats to people, industries or environment. These may be from foreign or endemic organisms, but they can also extend to pandemic diseases and the threat