Study design

Read the following article, paying close attention to the study design.

Benkouiten, S., Al-Tawfiq, J., Memish, Z. A., Albarrak, A., & Gautret, P. (2019). Clinical respiratory infections and pneumonia during the hajj pilgrimage: A systematic review. Travel Medicine and Infectious Disease, 28, 15-26.

Analyze the study design utilized, discussing the strengths and weaknesses of this design for this situation. Do you agree with the use of this design, or would you have recommended a different quantitative method? Defend your answer