Wood and Gorgas were both concerned with controlling yellow fever?

Yes, both Walter Reed and William Gorgas were concerned with controlling yellow fever.

Walter Reed was a microbiologist who conducted pioneering research on yellow fever at the turn of the 20th century. His team of scientists, which included James Carroll and Jesse W. Lazear, demonstrated that yellow fever was transmitted by mosquitoes, specifically the Aedes aegypti mosquito. This breakthrough finding overturned the widely-held belief at the time that the disease was caused by poor sanitation and foul air. Reed's work laid the foundation for effective mosquito control measures that significantly reduced the incidence of yellow fever in many parts of the world.

William Gorgas was a military physician and sanitarian who played a pivotal role in implementing mosquito control measures to combat yellow fever and malaria in the early 20th century. As the Chief Sanitary Officer of Havana, Cuba, and later the Panama Canal Zone, Gorgas oversaw extensive public health campaigns that included mosquito eradication efforts, sanitation improvements, and public education. His successful strategies resulted in a dramatic decline in the prevalence of yellow fever and other mosquito-borne diseases, transforming these regions and paving the way for the successful construction of the Panama Canal.

Both Reed and Gorgas made significant contributions to the understanding, prevention, and control of yellow fever. Their work demonstrated the power of scientific inquiry and public health interventions in combatting infectious diseases.