Sanaullah Tareen, Yasin, M., Aria Masoom, Zafar Iqbal, Amjad Mahboob and Samrina Sadaf 2023. Influenza Vaccination Rate, Awareness & Risk of Acute Exacerbation of Chronic Obstructive Pulmonary Disease (COPD): A Tertiary Care Cross-Sectional Analysis. Pakistan Journal of Chest Medicine. 29, 1 (Mar. 2023), 36–41.