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Read and watch some 1950s British sci-fi to get a feel for the period and 'science gone wrong' scenarios in the minds of authors at that time. Even if you don't use the scenarios, the background detail (survival, civil service and military attitudes and options for contaiment, available technology and a 1950s 'feel') will be very useful. As a starting point:The Day of the TriffidsThe Midwich CuckoosThe Quatermass ExperimentQuatermass IIQuatermass and the PitThe Death of Grass (adapted for film in 1970 as No Blade of Grass)