'So many people using the same equipment is bound to get a lot of bacteria'
Why we use 'is', not 'are', in the above sentence? 'So many people' isn't plural? Can you give me a similar example of this kind of sentence pattern, please?
It is not a very clear sentence:
"So many people using the same equipment is bound to generate a lot of bacteria" makes more sense.
"Is" is correct because the sentence is saying that the fact that so many people use the equipment is bound to generate a lot of bacteria.