Al Kharusi, Z., Al Kalbani, R. and Al-Hadhrami, R. 2024. Frequency of Asthma Exacerbations and Upper Respiratory Tract Infections Among Adults With Asthma According to Vaccination Status: Does the annual influenza vaccine have a protective effect?. Sultan Qaboos University Medical Journal. 24, 1 (Feb. 2024), 70–75. DOI:https://doi.org/10.18295/squmj.9.2023.053.