Columbia subject headings:
Air travel--Health aspects.
Aircraft cabins--Health aspects.
Bioterrorism--United States--Prevention.
Communicable diseases--United States--Prevention.
Harvard subject headings:
Air travel--Health aspects.
Aircraft cabins--Health aspects.
Bioterrorism--United States--Prevention
Communicable diseases--United States--Prevention.
Princeton subject headings:
Air travel--Health aspects.
Aircraft cabins--Health aspects.
Bioterrorism--United States--Prevention.
Communicable diseases--United States--Prevention.