To determine if type 1 and/or type 2 EBV infection can increase NOKs proliferation when growth factors are severely limiting, equal numbers of uninfected, Akata virus-infected and AG876 virus-infected NOKs were plated at sub-confluent conditions in KSFM media the absence of EGF and bovine pituitary extract (or serum), and 5 days later the number of viable cells in each condition was determined by trypan blue staining. Here, EGF is linked to Epstein-Barr virus infection.