Before revision:  The model attempts to incorporate the known scope of physical factors involved in the airborne transmission of such diseases , and is designed to serve not only as a common basis for scientific inquiry across disciplinary boundaries, but to also be understandable by a broad audience outside science and academia  .
After revision:  The model attempts to incorporate the known scope of physical factors involved in the airborne transmission of such diseases , and is designed to serve not only as a common basis for scientific inquiry across disciplinary boundaries, but , also be understandable by a broad audience outside science and academia .