[1]
E. B. GUTIERREZ, H. Y. LI, A. C. D. S. SANTOS, and M. H. LOPES, “ Effectiveness of influenza vaccination in elderly outpatients in São Paulo city, Brazil ”, Rev. Inst. Med. Trop. São Paulo, vol. 43, no. 6, pp. 317–320, Dec. 2001, Accessed: Jul. 17, 2024. [Online]. Available: https://revistas.usp.br/rimtsp/article/view/30556