There are specific lab certifications that are done they can post. If they did them then I sent an email to them for them to post them. Other companies have posted their certification letters from labs. I think it would help of Optec did the same.
They don’t test against COVID in labs as that is not only dangerous, but hard to do. Standard certification appears to be against salmonella; e. Coli; and some other less hazardous bacterium.
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