S .Jasim, Nafea, and Shiema Abid- Jabber. 2018. “Evaluation of Efficiency the Commercial Influenza Vaccines Used in Iraq by ELISA Technique.”. Al-Qadisiyah Journal of Pure Science 22 (4), 173 -83. https://journalsc.qu.edu.iq/index.php/JOPS/article/view/784.