Fig. 6From: Innovative design of 3D-printed nasopharyngeal pediatric swab for COVID-19 detectionAÂ Pediatric swab inserted in VTM tube. BÂ The swab inserted in the tube while keeping the breakpoint near the rim of the tube, applicator is broken from the break point indicator line. CÂ The swab tip submerged in the VTM tubeBack to article page