Zahid Hussain, M. Arif, Mehwish Akhtar and Farah Khalid 2025. Peak Expiratory Flow Rate Versus Acapella on Pulmonary Function in Elderly Post-Covid-19 Patients. Journal of Health and Rehabilitation Research. 5, 6 (Jun. 2025), 1–7. DOI:https://doi.org/10.61919/jhrr.v5i6.1923.