CD4 and infection: In the entire EU/EEA, 120,100 (95% confidence interval (CI): 113,000–127,800) people were estimated to be living with undiagnosed HIV by the end of 2015, of whom 47% had a CD4 count ≥500 cells/mm3 and 31% <350 cells/mm3, with 28,000 (95% CI: 24,700–31,700) new infections in 2015.