D.
Natural Killer cells
✓
C.
An inflammatory response and bacterial activity.
✓
A.
Antiviral medications
✓
A.
A viral infection only.
✓
B.
A bacterial infection only.
✓
C.
An inflammatory response, which can be due to infection.
✓
D.
An autoimmune disease.
✓
A.
Always cause disease.
✓
B.
Are entirely pathogenic.
✓
C.
Can be beneficial and protect against pathogens.
✓
D.
Are sterile and do not contain any microorganisms.
✓
A.
Direct contact with contaminated surfaces.
✓
C.
Airborne droplets that remain suspended in the air.
✓
D.
Vector-borne transmission.
✓
