Driver's license and passports are just laminated pieces of paper. Works pretty well. The vaccine card is what they are going with; it has been in the news. Sure a phone app that uses block chain would be more secure, but that is not what the plan is. You guys are dreaming again. The lateral flow tests are good, hopefully we get a nice slice of pie with those, but dreaming up Pfizer connections is premature at this point.
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