More cards in this set

Epidemics can be caused by too many people refusing to be...

Random mutations cause...

New strains of the disease are most likely to occur when people....

A clinical trial where neither the patient or doctor knows what drug each patient is getting...

Only the doctor knows who is getting what drug...

Where everyone knows what drug they are receiving....

Harmless drugs given to see if drugs are needed...

These carry blood away from the heart...

These carry blood from the organs to the heart...

These carry blood between arteries and veins...