If I am correct, it took less than 50 years for the human population to sky rocket
:)
2. Antigen
Toxins
3. Some bacterial infections
Viral
4. Innate immune system
5. Adaptive
6. Leukocytes
7. Humoral response
Cell mediated response
8. B cells
T cells
9. Helper T cell
Cytotoxic T cell
10. Antibody production.
From g00gle!
if it doesnt let you see its 44.74 mph
The most logic answer is B.