ROCKVILLE, Md., July 22 /PRNewswire-FirstCall/ -- Novavax, Inc. (Nasdaq: NVAX - News) announced today final selection of a Respiratory Syncytial Virus (RSV) vaccine candidate that will be advanced into additional preclinical studies to support an Investigational New Drug (IND) application. As previously announced, Novavax has been evaluating a number of RSV vaccine candidates, all of which have successfully induced antibody responses in mice. Novavax scientists have now engineered a new vaccine candidate which has been shown to protect mice against RSV disease and can be produced at sufficient yields to allow commercial manufacture. This new candidate is directed against a protein on the surface of the virus, the "F" or "fusion" protein, which is the protein that the virus uses to infect and fuse with cells in the respiratory tract and cause disease.