Advocacy of (the use of face masks) by the public as a measure against the spread of COVID-19 is controversial, with some healthcare professionals arguing that (the use of a face mask) may increase the rate at which people touch their faces, due to readjusting the mask.
What's the difference in meaning between using "face mask" and "face masks" in the above parentheses? Are they interchangeable?
Thanks!
anonymous What's the difference in meaning between using " a face mask" and "face masks" in the above parentheses? Are they interchangeable? There's no difference.
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anonymousWhat's the difference in meaning between using "a face mask" and "face masks" in the above parentheses? Are they interchangeable?
There's no difference. They are interchangeable.
CJ