We should test everybody for antibodies.
But the municipal workers would be good first tries.
They’ve been around ‘it’ for as long as ‘it’ has been here. Did they have ‘it’ and get sick? If so, when? Antibody tests can discern that to a certain extent.
What’s in YOUR blood sample?
It will be like a credit card, or bar code that you can keep on your SMART phone.