have you watched the movie? Asking so obvious questions here...

no.
while sleep walking,neville placed fred there.

darkseeker put fred there la, it has been long time, Robert is a bit 'sot' (crazy) too

i hated this movie because this is just another movie that injects hysteria and fear into people
it demonises Biotechnology and also medical testing. i mean the first bullshit is that before human testing there was animal testing and the animal testing might last a couple of years before eve considered safe for human trials.
and testing 10005 humans on an antidote for cancer is bull crap. there are 3 stages of human testing and the  first stage only allows about 5 live human subjects.

if the drug causes any problem in the first 2 years the whole thing is aborted.

and there is no virus capable to change a complex organism into something like a dark seeker. it doesnot have enough space to store enough info to cause such drastic changes

the only virus capable to cure cancer now is an STD called the CMV which targets hepatic cancer. not curing it bur slowing its growth.

Did u believe it