The Chinese made the observation that if one had a weak strain of smallpox, one would not get a strong strain of smallpox later. This is situation is termed:

Question

Quizplus · Accepted Answer

Variolation is the practice of deliberately introducing material from smallpox sores into the skin to induce immunity, based on the observation that exposure to a mild form of the disease could protect against more severe forms.

The Chinese Made the Observation That If One Had a Weak