มกราคม
mould
prescribe
resistant
trial
infections
cure
bacteria
70 y ago people were very worried about getting ...
fleming found that the... in the petri dish killed..
the... of penicillin on mice was successful
Florey is team knew that penicillin could... infeciions
after a few years some bacteria became... to penicillin
doctors now... penicillin less often than in the 1940s