FIGURE 7 Percentage of Positive Results, Internal Quality Control Failures, and Contamination After COVID-19 PCR Tests at Indus Hospital, Karachi, Pakistan, From March 2020–March 2021a
Abbreviations: COVID; coronavirus disease; IQC, internal quality control; PCR, polymerase chain reaction.
aThe spike in January 2021 in the percentage of internal control failures is due to a shortage of automated testing kits and the use of a new, previously unused manual COVID-19 PCR testing kit supplied by the Government of Sindh. The kit was subsequently not used due to suboptimal performance.