HSC Investigating Science Practice Questions - HSC Investigating Science (NSW Higher School Certificate, Year 12) Exam

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Ignaz Semmelweis observed that maternity wards attended by medical students had higher rates of puerperal fever than wards attended by midwives. What intervention did he introduce to test his cause-and-effect hypothesis?

Mandatory handwashing with a chlorinated lime solution prior to examining patients Administering penicillin to all mothers immediately after childbirth Isolating all feverish mothers in negative-pressure ventilation rooms Replacing doctor consultations with herbal antiseptics

Correct Answer:

Mandatory handwashing with a chlorinated lime solution prior to examining patients

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