IMO, testing apps like QMCH will become dominant f
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Because it's unknown whether vaccines will protect against new variants, it's more important to know whether you are virulent and infectious TODAY, and that's what Innova's tests do and they detect the main variants, too.
The other problem is that it could take years to vaccinate everyone, and it's unknown how often you'll need a new one to replace antibodies or protect against variants. Airlines will not turn down business if not vaccinated, because it says nothing about your health today. An Innova test before boarding and one in your destination country will either cut down or eliminate quarantine on arrival.