Erratum.
The article by Marjorie Sun "Virginia OKs rabies vaccine test" (News & Comment, 14 July, p. 126) states that the first outdoor experiment with a genetically engineered virus is expected to be conducted by the Boyce Thompson Institute for Plant Research at Cornell University. The first outdoor test of a genetically modified virus actually took place in 1984, when Saul Kit of Baylor College tested an altered pseudorabies virus on pigs.