uninfected

1. Millions of uninfected animals have been slaughtered and incinerated to prevent the spread of the dreadful virus.

2. Then the team infected those chickens with bird flu and put them in cages with uninfected chickens.

3. First, a small number of individuals remain uninfected despite good evidence of repeated exposure to HIV.

4. Chimps infected with the virus were between 10 and 16 times likelier to die in any one year compared to uninfected counterparts.

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