The negro population are pitted with the small-pox in the same manner as Europeans.
10th. Are there periodical vaccinations of large districts? or, is each child vaccinated soon after its birth? if the latter, how soon?
The practice, in these cases, is, as long as the vaccine lymph continues to produce a genuine disease, to keep it up by the weekly vaccination of all comers. Children are rarely vaccinated under four weeks old; but there is no rule observed on this head.
11th. What sort of scars are usually left in the arms?
The scar bears the shape of the original vesicle, and is slightly depressed below the surface of the surrounding skin; the surface of the scar is marked by a number of small depressions of various shapes, corresponding, I believe, with the cells in the original vesicle.
12th. Is vaccination, in hot countries, attended with feverish symptoms? and, if it is, on what day do they begin?
Vaccination is, sometimes, in this country, attended with feverish symptoms; but, in the most marked cases, so far as I have seen, these symptoms have been so slight, as almost to escape common observation. I have not remarked on what day they begin.
13th. Is vaccination ever followed by any eruptions?
I have seen only one case of this: an eruption appeared on the sixth day after unsuccessful vaccination; it was diffused over the whole body, and is now in progress.
W. FERGUSON, Assistant Surgeon, Royal African Corps.