Modulation of HIV-1 macrophage-tropism among R5 envelopes occurs before detection of neutralizing antibodies.
Richards KH, Aasa-Chapman MM, McKnight A, Clapham PR. Modulation of HIV-1 macrophage-tropism among R5 envelopes occurs before detection of neutralizing antibodies. Retrovirology. 2010 May 27; 7:48.