Only one building was restricted during the 1951 NIH open house—Building 7, specially designed for infectious disease research. Children under 16 were not admitted. And there was only one demonstration: Dr. Karl Habel of NIH's National Institute of Allergy and Infectious Diseases (NIAID) showed the special procedures necessary in the collecting and handling of material for research on and vaccine development for rickettsial diseases carried by ticks. In this photo, is Dr. Habel following his own advice?
