A dualtropic HIV strain uses both the CCR5 and the CXCR4 coreceptors.

John will be at our service for the duration of the visit.

In the afternoon a party of us strolled out to the Chinese city [Peking], through the Great Meridian Gate, to examine the curiosity shops. The narrow streets or hutungs in this quarter reminded me of Canton.

It is far from being what I should like to write about them, but perhaps enough has been said to forestate the problem as it appears to one who has traveled with these children and learned to know them “in the open.”