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During the time of a pandemic and the existence of a highhly contagious corona-virus,many scientists recommended wearing a mask. lets' assume that wearing a mask
During the time of a pandemic and the existence of a highhly contagious corona-virus,many scientists recommended wearing a mask. lets' assume that wearing a mask can limit the spread of the virus. Is wearing a mask an externality? positive or negative?How about not wearing a mask? Explain your answers.
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