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Solo Diver
The mRNA vaccines have shown a 95 percent efficacy against symptomatic disease. Testing for asymptomatic infection was not done in the Pfizer or Moderna trials but analysis of the data from the AstraZeneca/Oxford clinical trials showed a 67% reduction in transmission.It is hard for me to imagine why a vaccination record would be a suitable substitute for a negative Covid-19 test. Even with the best, currently available vaccines, a person still has a 5% change of contracting the virus, therefore possibly being a Covid-19 vector for others. A second Moderna or Pfizer vaccination should greatly increase your odds of not getting seriously ill or dying from Covid, but there is no guarantee that you could not get, transmit the virus, or have a positive Covid test.
Compare that to the less than 50 percent ability of the rapid antigen tests to detect asymptomatic infection.
So would I rather fly with a vaccinated traveler or an antigen tested traveler? I’ll take the vaccinated.