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Anti-SIVenv Ab titer and neutralizing Ab. Simian immunodeficiency virus (SIV)-specific Ab titers were examined at the indicated times. The upper and middle panels show anti-SIVenv Ab titer for individual monkeys, whereas the bottom panel shows the geometric means of the titers for the vaccinated and unvaccinated monkeys. Vac, vaccinated monkey (n = 5); Con, control monkey (n = 4).
