Answer:
Food security : The measure of the availability of food and individuals' ability to access it.
A pandemic : An epidemic occurring worldwide, or over a very wide area, crossing international boundaries and usually affecting a large number of people.
Limitations are important to understand for placing research findings in context, interpreting the validity of the scientific work, and ascribing a credibility level to the conclusions of published research. This goes beyond listing the magnitude and direction of random and systematic errors and validity problems.
