Anvisa announced that it was creating a legal framework for regulations .
Brazil 's health - regulatory agency , Anvisa , declared on 12 April 2016 that it would regulate Oxitec 's mosquitoes .
Anvisa announced that health - regulatory agency was creating a legal framework for regulations .
Brazil 's health - regulatory agency , Anvisa , declared on 12 April 2016 that it would regulate Oxitec 's mosquitoes .