PPIA and nasopharyngeal carcinoma: As a corresponding result, all the EBV‐positive cells, including EBV‐genome transfected cells (C2089), NPC cells (C666‐1), gastric cancer cells (AGS‐EBV), and lymphoma cells (Raji), exhibited higher levels of exosomal CYPA when compared with EBV‐negative cells (293, HK‐1, 5‐8F, AGS‐, BJAB) (Figure 5B‐E).