Imagem de fundo

those in "30 and 60% of those infected" (ll.21-22) refers to:

Ano: 2004
Banca: Núcleo de Computação Eletrônica UFRJ - NCE
Prova: NCE - MAPA - Fiscal Federal Agropecuário - Área Famacêutico - 2004
those in "30 and 60% of those infected" (ll.21-22) refers to:
A
birds;
B
viruses;
C
scientists;
D
people;
E
animals.