The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From University of Nebraska - Lincoln:
Prisoners in a secure research facility are plotting their escape while researchers seek to understand how to prevent the next wave of infection. As they plot their next rampage, the prisoners muse on the damage they have inflicted in the past and hope to again inflict in the future. Explore just how deadly a virus can be and the impact that an outbreak can have on the environment. Learn how researchers are working around the clock to keep these silent killers Confined.Travel the world with the many types of FMDV, look inside the virus and discover what makes it work, and explore the complex world of this tiny killer. All this and more in Confined! HD, from the World of Viruses.Learn more about The World of Viruses and our collection of other iOS Games and Apps at http://www.worldofviruses.unl.edu.