And so we started gathering scientists and started learning about population, learning about vaccines, learning about what had worked and what had failed, and that's really when we got going, was in late 1998, 1999.
Começámos a reunir cientistas e começámos a estudar a população, as vacinas, o que havia funcionado e o que havia falhado. Foi então que começámos. Foi no fim de 1998, início de 1999.