 During his time at the Laboratory, he had extensive experience in vaccine manufacture producing over a million doses of smallpox and cholera vaccine annually.He undertook over the years a variety of sanitary work, including malariology, mosquito surveys, experimental work on larvicides and plague work.This also involved a large amount of histology and the overall supervision of a laboratory dealing with 40-60,000 general bacteriological specimens and 2-4000 Wasserman and Kahn tests annually.