Thach. Minister of Health. D.R.V.N.. whereby mosquitobreeding areas have been cleared and levels of personal hygiene have been raised. (b) In South Vietnam. our Canadian teams which use BCG vacine composed of live antibodies requiring refrigeration. travel into refugee camps and outlying hamlets to carry out Mantoux tests. returning three days later to read and record these tests. frequently find movement or absence of the tested population. thus negating our efforts and reducing the entire procedure to still another futile farce. In North Vietnam. a method of heating antibodies to 43 C permits the vaclne to be kept for three months without refrigeration and used without need for allergy testing. has resulted in vacinating about five million adults and 350.000 newborn babies every year since 1962. (c) After the writer was prohibited from completing the pharmacy inventory in the Canadian AntiTuberculosis Hospital in Quang Ngai in January 1968. it was reported by the former medical director that the three year supply of antibiotic medications on hand at that time was no longer present three months later. This in turn would obviously mitigate against treatment of those buying the pills on the black market. who would have ingested same in indeterminate quantities. thus rendering themselves immune to future treatment.