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2004 MAR 31 - (NewsRx.com & NewsRx.net) -- Tests of an experimental smallpox vaccine have produced encouraging results in monkeys and mice. The discovery may lead to an alternative for humans unable to receive current smallpox vaccines.
Monkeys treated with modified vaccinia virus Ankara (MVA) were immune to monkeypox, which is similar to smallpox in humans, reported Bernard Moss and colleagues at the U.S. National Institutes of Health in the March 11, 2004, issue of Nature. Monkeys that did not receive the treatment became severely ill after being exposed to monkeypox.
Monkeys were most resistant to the disease when treated with MVA and then with the existing smallpox vaccine Dryvax, the authors reported. This suggests that MVA could be used as a "prevaccine," to which Dryvax could be added in the event of a specific smallpox threat, or ...