The study aims to determine whether government policies control population mobility have been successful in the fight against coronavirus disease 2019 (COVID-19) pandemic. Policies implemented by governments for controlling are identified with Stringency Index prepared Oxford University. Population is observed through data provided Google Community Mobility Report. success of countries COVID-19...

a major constraint to the application of any form of knowledge and principles is the awareness, understanding and acceptance of the knowledge and principles. systems thinking (st) is a way of understanding and thinking about the nature of  health systems and how to make and implement decisions within health systems to maximize desired and minimize undesired effects. a major constraint to applyi...

BACKGROUND Although vaccination can be a useful tool for control of avian influenza epidemics, it might engender emergence of a vaccine-resistant strain. Field and experimental studies show that some avian influenza strains acquire resistance ability against vaccination. We investigated, in the context of the emergence of a vaccine-resistant strain, whether a vaccination program can prevent the...