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Figure 1 | BMC Infectious Diseases

Figure 1

From: Nasal swab samples and real-time polymerase chain reaction assays in community-based, longitudinal studies of respiratory viruses: the importance of sample integrity and quality control

Figure 1

Number of samples negative for ERV3 during screening of each sample extraction batch (92 samples per batch). A total of 56 extraction batches were performed in the first 20-months of the study. Each batch was tested for quality control (EHV1/ERV3 PCR), following which every four batches were pooled and pools were screened for respiratory viruses other than rhinovirus. The batches used in the analysis are indicated by the solid line.

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