FIGURE 6.

A comparison of 3 washing conditions for RNA purification from saliva using carboxylated beads with 700-mM sodium chloride (NaCl) and 14% polyethylene glycol (PEG), as measured by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA recovery by N1 qPCR from contrived saliva samples. (a) A measurement of RNA recovered from a 30-second wash in the indicated wash buffer. (b) A measurement of RNA recovered from a 30-second elution in water from samples washed using the indicated wash buffer.