<span>Control infectious diseases because in the early 1900s in the United States, many major health threats were infectious diseases associated with poor hygiene and poor sanitation (e.g., typhoid), diseases associated with poor nutrition (e.g., pellagra and goiter), poor maternal and infant health, and diseases or injuries associated with unsafe workplaces or hazardous occupations.</span>
Answer:B
Explanation:
A number of groups were led
I think the answer is Europe
