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Cumulative number of HIV-infected donors appearing in the early WP ramp-up phase (<27,000 cps/mL) during 3 years of ID-NAT screening corrected for the reduced probability of detection by Ultrio during the initial infection phase (<20 cps/mL). Cumulative appearance of donors at viral doubling time of 0.85 days (◆) and at doubling times of 0.76 and 0.98 days (◇) representing 95% CIs.8
