Subject
Biological warfare
Bioterrorism
50
Prevention
43
Chemical warfare
42
Biological weapons
34
Safety measures
27
History
16
Terrorism
15
Research
14
National security
11
Emergency management
10
Health aspects
10
Civil defense
9
Medical care
9
Biological arms control
8
Moral and ethical aspects
8
Chemical agents (Munitions)
7
Communicable diseases
7
Evaluation
7
Korean War, 1950-1953
7
Public health
7
Security, International
7
Agroterrorism
6
Biotechnology
6
Health risk assessment
6
Vaccines
6
Armed Forces
5
Nuclear warfare
5
Security measures
5
Social problems
5
Social sciences
5
Sociology
5
Soldiers
5
Biosecurity
4
Crime
4
Criminology
4
Environmental aspects
4
Environmental health
4
Health and hygiene
4
Methodology
4
Protection
4
Public health surveillance
4
Risk assessment
4
Standards
4
Violence
4
Weapons of mass destruction
4
World health
4
Agriculture
3
Anthrax
3
Biomedical engineering
3
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