CHAD and infection: Five days post infection, we performed scRNAseq on the isolated eGFP+ neurons from the virus-infected DRG, showing that most of the virus-infected PNs (most, if not all, are Ia-PNs) expressed Lmcd1, but not Fxyd7 or Chad (Fig. 2h) and 26 out of 30 virus-infected PNs were unbiasedly assigned to cl.1–3 using machine learning algorithm (Fig. 2i)21, further confirming the type Ia identity of the LMCD1+ PNs.