SAEED, M.; SAEED, S.; TARIQ, A.; HYDER, H. S. Frequency of Positive PCR test and Complications in Nasopharyngeal Swabs of Suspected Patients and Contacts of COVID-19 Tested at Allied Hospital Faisalabad. Annals of Punjab Medical College (APMC), v. 15, n. 1, p. 25-27, 31 mar. 2021.