RPA1 and COVID-19: Saliva is an attractive sample material for COVID-19 diagnostics with potential for early detection (Savela, 2021), and has been shown to be a viable template for nucleic acid amplification via RT-PCR (Ranoa et al., 2020), recombinase polymerase amplification (RPA) (Myhrvold et al., 2018), as well as RT-LAMP (Lalli et al., 2021; Rabe and Cepko, 2020).