hsa-mir-3908: Hsa-mir-3908 is a microRNA that has been implicated in various biological processes and diseases (1). It has been shown to play a role in immune escape by regulating programmed cell death-ligand 1 (27) and in inducing stemness in EBV-associated gastric cancers through sponging circ-LMP2a (28) [PMC9093110]. Hsa-mir-3908 is also one of the shared microRNAs between ACE2 and TMPRSS2 genes, which are important for the entry of SARS-CoV-2 into host cells [PMC9511898]. In a study on MCI-AD and AD-dementia patients, hsa-mir-3908 was one of the most abundant miRNAs detected in blood leukocytes, CSF, and serum samples [PMC7515963]. It was found to be downregulated in MCI-AD patients compared to controls [PMC7515963]. The expression levels of hsa-mir-5588-5p, hsa-mir-3658, hsa-mir-567, and hsa-mir-3908 were quantitatively analyzed using the 2^-ΔΔCt method [PMC7515963]. Among these miRNAs, only hsa-mir-567 was found to be highly expressed in all examined tissues [PMC7515963]. These findings suggest that hsa-mir-3908 may have important roles in immune regulation, cancer progression, and neurodegenerative diseases (1). Further research is needed to fully understand its functions and potential therapeutic implications (1).