For those of you who thought the scientists were stupid: My Brother The DOCTOR once asked my mother for help cooking a turkey and she started her instruction by telling him to wash it before he prepared it, which he did...with dishwashing liquid. The moral: smart people can do really stupid things. That makes them human, not a problem with the narrative.
My problem was with them having no concept of any scientific method (as well as being stupid). If they had taken even the most basic precautions but the situation got out of hand due to one or two stupid things (or David's desire to get the ball rolling) the general stupidity level would have come down a few notches.
They could have lifted really basic safety pointers from Stargate SG1 and seriously improved the plot. In fact low tech MALPS would have been better than the mildly irritating floaty things that inexplicably failed to help the guy that owned them find his way to an exit.
Another example is that in Alien there is a defined quarantine protocol that took place in the airlock. It didn't take long to explain in the plot and Ash broke it due to his own agenda. In this movie they had the cargo bay open to the atmosphere...
So you have somebody that you think need to be quarantined. Do you:
a) Shoot them with a tranquiliser dart, breaching their encounter suit, potentially suffocating them, and allowing the pathogen out of the suit?
b) Decide that the established quarantine procedure, if drafted by these idiot scientists, probably isn't worth the paper it's written on and flame them instead, killing them and limiting you chances of getting useful information from an autopsy?
c) Tazer them to incapacitate them to carry out a exam under your established quarantine procedures while they are hopefully still alive?
d) Examine them in your sterile mobile lab that you set up outside the ship?