Question

1. which of the following best describes hubeners findings in 1897? a○wearing face masks cannot limit the spread of disease. b○wearing face masks reduced both bacterial and viral emissions from the mouth and nose, suggesting use by physicians and patients to limit disease spread. c○wearing face masks reduced viral emissions from the mouth and nose, suggesting use by physicians and patients to limit disease spread. d○wearing face masks reduced bacterial emissions from the mouth and nose, suggesting use by physicians and patients to limit disease spread.

Explanation:

In 1897, Hubener found that wearing face - masks reduced bacterial emissions from the mouth and nose, suggesting their use by physicians and patients to limit disease spread. Viruses were not well - understood in 1897, so findings related to viral emissions are incorrect.

Answer:

D. Wearing face masks reduced bacterial emissions from the mouth and nose, suggesting use by physicians and patients to limit disease spread.