front |1 |2 |3 |4 |5 |6 |7 |8 |9 |10 |11 |12 |13 |14 |15 |16 |17 |18 |19 |20 |21 |review

Biological agents are the oldest of the nuclear, biological, and chemical (NBC) triad and have been used by governments in warfare for over 2,500 years.