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COVID exposed physical vulnerabilities

LCHC Nurse Practitioner Julie Chan makes a young patient laugh to put him at ease before administering a COVID-19 test at LCHC's testing facility on Buffum Street in Lynn. (Spenser Hasak)
To put it in terms people can visualize, one dust particle — a big one — can measure up to five microns, a micron being one-millionth of a meter. On the other hand, the estimated diameter of the COVID-19 virus is between 60 and 140 nanometers, a nanometer being one billionth of a meter.   You…

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