No, I don't have access to Tesla's cost information. Im sure this is costing them 10s to 100s of millions in lost revenue and plenty paying for stuff that is down but still costs money to maintain.

It's not clear to me how to balance those costs against the decisions made by public health officials who are experts. I'm certainly not a "even one death is unacceptable" believer, nor do I think we should unnecessarily expose large numbers of people to risk (especially in the case of highly infectious diseases).

Assuming Tesla made wise decisions, I'm sure only a small number of people more would provably get sick due to exposure at the factory. But it's not Elon's sole decision.