CDC Announces New Guidelines for Travels Vaccinated Against COVID-19

People who are fully vaccinated against COVID-19 can safely travel within the United States and overseas as long as they continue to take precautions like wearing a mask in public, according to new guidance released Friday by the the Centers for Disease Control and Prevention.

In terms of "severe" illness and death, the vaccine is 95%, and up to 100%, effective, according to definitions set by the U.S. Food and Drug Administration (FDA) and Centers for Disease Control and Prevention (CDC), respectively.

The study from Pfizer-BioNTech says the vaccine remains highly effective after six months and retains efficacy against the B.1351 variant first detected in South Africa.

'The information coming from Pfizer-BioNTech is good news with evidence that those enrolled in the clinical trials past year are still protected.

A person is considered fully vaccinated two weeks after receiving the last recommended dose of vaccine, the CDC said.

While neutralisation reduced 14-fold when tested against the Brazilian variant, experts believe the very high immune response generated by the vaccine is enough to provide protection against that strain. The vaccine now has emergency use authorization, EUA, which falls short of full approval.

Although the new study did not look at the Oxford University/AstraZeneca vaccine, Prof Moss said the evidence for the jab is that "it's very, very effective". They said there were nine cases of COVID-19, all of which were observed in the placebo group. That means the second shot for vaccines that require two jabs.

Safety data collected from more than 12,000 participants found no serious safety concerns, the release said.

The antibody response in these people remained 28-fold higher even after the second vaccine dose.

But he added it will be crucial to see how long antibody levels are maintained after people have had a Covid-19 vaccine.

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