CDC Announces New Guidelines for Travels Vaccinated Against COVID-19

It was also 100 percent effective against severe disease as defined by the CDC, as well as 95.3 percent effective against severe disease as defined by the FDA, the companies said.

The South African study among 800 people in South Africa, nine cases of the South African variant of Covid were observed - all in the group not given the vaccine.

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

"It is an important step to further confirm the strong efficacy and good safety data we have seen so far, especially in a longer-term follow-up", BioNTech CEO Ugur Sahin said.

The study found cellular T cell responses developed in 63% of the older people given two doses of the Pfizer jab.

Pfizer and BioNTech's coronavirus vaccine, the first to receive the Food and Drug Administration's emergency use authorization in the United States, has shown continued high effectiveness against COVID-19 up to six months after full immunization.

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". That makes for lasting immune protection.

Australia probes if blood clot case linked to AstraZeneca vaccine
There were no reports of the same reactions to the vaccine from Pfizer Inc. and BioNTech SE, which is also being used in Britain. Asked about Australia's own rollout of COVID-19 vaccinations, Professor McLaws said that it has been "very slow".

Pfizer and BioNTech have announced new results from their clinical trial, showing 100 percent efficacy at preventing COVID-19 cases in South Africa, where variant B.1.351 is prevalent.

The firms said that of these cases, 850 occurred among participants who got the placebo, while 77 were in the vaccinated group.

The companies said the results contained data on more than 12,000 participants who had been fully inoculated for at least six months.

The Pfizer and BioNTech vaccine is normally administered in two doses, 21 days apart, to provide almost full protection against the novel coronavirus, known as SARS-CoV-2.

'These mRNA vaccines - it really seems the level of antibodies they elicit are so high, they are persistent.

'I would not be surprised if this is a vaccine that we only get once'.

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