ERVW-1 and infection: Very recently, nanosensors (based in gold nanorods functionalized with DENV envelope protein) were developed for DENV infection immunodiagnostics, and were demonstrated to be able not only to distinguish the DENV serotype responsible for the infection, but also to discriminate between DENV and other flaviviruses, such as ZIKV, thus avoiding the frequently observed cross-reactivity [134].