2.what simple infection control procedure dr. ignaz semmelweis save a number of lives in the 1800s?

The correct answer is the - hand washing before lunch and clinical process.

Explanation:

Dr. Ignaz Semmelweis was a Hungarian physician that is known as father of the infection control by the hand washing. He is also known as the saviors of mothers as at that time mothers were dying after childbirth due to the infection.

Dr. Ignaz suggested the hand wash procedure before clinical procedures and eating helps in the saving life by preventing infection due to unhygienic hands.

Thus, the correct answer is - hand washing before lunch and clinical process.