Smallpox warning

All stocks of smallpox virus in labs should be destroyed as soon as possible, scientists warn. No one has been immunised against smallpox for more than 20 years. And hardly any facilities for making the vaccine still exist, says Donald Henderson, an epidemiologist at Johns Hopkins University in Baltimore: “We are in an extremely vulnerable position in regard to smallpox.” Henderson and Joel Bremen of the National Institutes of Health have called on the WHO to destroy all remaining smallpox viruses by 1999 (The New England Journal of Medicine, vol 339,
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